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<td><a href="https://www.psypost.org/sexual-arousal-creates-tunnel-vision-that-makes-ambiguous-dating-cues-look-like-interest/" style="font-family:Helvetica, sans-serif; letter-spacing:-1px;margin:0;padding:0 0 2px;font-weight: bold;font-size: 19px;line-height: 20px;color:#222;">Sexual arousal creates “tunnel vision” that makes ambiguous dating cues look like interest</a>
<div style="font-family:Helvetica, sans-serif; text-align:left;color:#999;font-size:11px;font-weight:bold;line-height:15px;">May 9th 2026, 10:00</div>
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<p><p><em>Why do people cling to hope when signals of romantic interest are mixed? Our new research suggests that sexual arousal may make signs of disinterest harder to recognize.</em></p>
<p><strong>“You’re attractive and smart, but I’m looking for something else.”</strong></p>
<p>I used to think this was a clear, kind way to reject someone. I was wrong.</p>
<p>In one pilot study, I tested different rejection messages to see which ones would make people clearly understand that a potential partner was not interested. At first, I softened the rejection with compliments because I did not want participants to feel unnecessarily hurt.</p>
<p>But after several rounds of testing, I realized something important: <strong>when rejection is mixed with warmth or flattery, people often do not fully register it as rejection.</strong> They ignore the “no” and cling to the part they want to hear. By trying to be “nice,” I was actually providing the fuel for their fantasies.</p>
<p>That pattern will feel familiar to anyone who has watched <em>He’s Just Not That Into You</em> or spent time in the modern dating world. One person is interested; the other doesn’t reciprocate but avoids saying so directly. The hopeful partner then fixates on the one “nice” text message while ignoring a mountain of evidence that the feeling isn’t mutual.</p>
<p><strong>The Science Behind the Self-Deception</strong></p>
<p>In our recent research<sup>1</sup>, we asked: When are people most likely to mistake mixed signals for real interest? We know from earlier work that sexual arousal can make romantic or sexual fulfillment feel more important than other considerations.<sup>2,3</sup> In doing so, it narrows attention into a kind of “tunnel vision.” We wanted to see whether that tunnel vision leads people to focus on the signs they <em>want</em> to see while overlooking the ones they don’t.</p>
<p><strong>What we did</strong></p>
<p>We conducted four studies. In each study, unpartnered participants first watched either sexual or nonsexual videos and then interacted online with an attractive potential partner who was actually part of the research team (a confederate). Participants then rated how desirable the partner seemed and whether they believed that person would want to date them.</p>
<p>To see how deep this bias goes, we varied the timing and clarity of rejection across the studies:</p>
<ul>
<li><strong>The mixed signal:</strong>In the first three studies, the partner was warm but sent ambiguous cues; sometimes at the start, sometimes at the end, and sometimes woven throughout the entire conversation.</li>
<li><strong>The clear “no”:</strong>In the final study, we replaced the ambiguity with a blunt, clear rejection to see whether desire could overcome even the most obvious “no.”</li>
</ul>
<p><strong>Study 1</strong> examined what happens when an interaction starts off positively and the ambiguity appears only afterward. Participants first had a warm online chat with a potential partner and then read that partner’s fantasized date scenario featuring them both, which hinted at interest but also introduced uncertainty.</p>
<p><strong>Study 2</strong> moved the ambiguity to the very end of the interaction. After watching either sexual or nonsexual videos, participants chatted online with a confederate who seemed engaged and warm but ended the exchange with an ambiguous message: “<em>The truth is I really enjoyed talking with you, and I would have been happy to get to know you better. I’ll share that I’m in a really busy period, and I’m not sure how much free time I have. Haha, sorry, I got a bit carried away… I think we finished discussing everything they asked of us, so I’ll call the experimenter</em>.”</p>
<p><strong>Study 3</strong> made the mixed signals harder to dismiss by weaving them throughout the interaction. The confederate alternated between warmth, compliments, and subtle signs of mismatch or hesitation, making the ambiguity persistent rather than momentary.</p>
<p><strong>Study 4 </strong>tested the limit of that effect by replacing mixed signals with a clear rejection. Instead of asking whether sexual arousal biases perception under mixed signals, we asked whether that same bias survives when the other person’s lack of interest is unmistakable.</p>
<p><strong>What We Found</strong></p>
<p>Across the first three studies, sexual arousal made participants significantly more likely to interpret ambiguous interactions optimistically. They saw interest where there was only uncertainty. Part of the reason seems to be that arousal increased the partner’s desirability, further fueling the tendency to see what people wanted to see.</p>
<p>However, Study 4 showed where this effect broke down: when rejection was clear and unmistakable, arousal no longer distorted perception. In fact, under clear rejection, arousal actually made the partner seem <em>less</em> desirable.</p>
<p><strong>The takeaway?</strong> <strong>Sexual arousal distorts perception only when the situation leaves room for hope.</strong> It can help us push past the fear of rejection by tilting perception in a more hopeful direction. That may be useful in the early stages of dating, when uncertainty is everywhere. But it also comes with a risk: <strong>desire can overshadow sensitivity to another person’s actual wishes.</strong> In those moments, we may not see the interaction as it is; we see it as we hope it to be—missing the signs that the door is not actually open.</p>
<p><strong>References:</strong></p>
<ol>
<li>Birnbaum, G. E., & Zholtack, K. (2026). They are just not that into you: Does sexual arousal impair perception of rejection cues? <em>Personality and Social Psychology Bulletin</em>. <a href="https://doi.org/10.1177/01461672261439417">https://doi.org/10.1177/01461672261439417</a></li>
<li>Birnbaum, G. E., Iluz, M., Plotkin, E., Tibi, L., Hematian, R., Mizrahi, M., & Reis, H. T. (2020). Seeing what you want to see: Sexual activation makes potential partners seem more appealing and romantically interested. <em>Journal of Social and Personal Relationships, 37</em>(12), 3051–3069. <a href="https://doi.org/10.1177/0265407520952162">https://doi.org/10.1177/0265407520952162</a></li>
<li>Birnbaum, G. E., Iluz, M., & Reis, H. T. (2020). Making the right first impression: Sexual priming encourages attitude change and self-presentation lies during encounters with potential partners. <em>Journal of Experimental Social Psychology, 86,</em> 103904. <a href="https://doi.org/10.1016/j.jesp.2019.103904">https://doi.org/10.1016/j.jesp.2019.103904</a></li>
</ol></p>
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<td><a href="https://www.psypost.org/scientists-discover-a-hydraulic-link-between-the-abdomen-and-the-brain/" style="font-family:Helvetica, sans-serif; letter-spacing:-1px;margin:0;padding:0 0 2px;font-weight: bold;font-size: 19px;line-height: 20px;color:#222;">Scientists discover a hydraulic link between the abdomen and the brain</a>
<div style="font-family:Helvetica, sans-serif; text-align:left;color:#999;font-size:11px;font-weight:bold;line-height:15px;">May 9th 2026, 08:00</div>
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<p><p>A recent study published in <em><a href="https://doi.org/10.1038/s41593-026-02279-z" target="_blank">Nature Neuroscience</a></em> suggests that the brain is more mechanically connected to the body than previously appreciated. Scientists found that abdominal muscle contractions compress blood vessels connected to the spine and brain, pushing fluid that gently moves the brain within the skull. This physical swaying provides evidence for how exercise might benefit brain health by washing away cellular waste.</p>
<p>Scientists set out to understand the specific mechanical origins of brain motion in awake animals. The central nervous system is encased in thick bone, making it seem isolated from the physical forces of the rest of the body. However, the work builds on previous studies detailing how sleep and neuron loss can influence how and when cerebrospinal fluid flushes through the brain, according to Patrick Drew, a professor of engineering science and mechanics, neurosurgery, biology and biomedical engineering at Penn State. </p>
<p>“Our research explains how just moving around might serve as an important physiological mechanism promoting brain health,” said Drew, corresponding author on the paper. “In this study, we found that when the abdominal muscles contract, they push blood from the abdomen into the spinal cord, just like in a hydraulic system, applying pressure to the brain and making it move.”</p>
<p>“Simulations show that this gentle brain movement will drive fluid flow in and around the brain,” Drew said. “It is thought the movement of fluid in the brain is important for removing waste and preventing neurodegenerative disorders. Our research shows that a little bit of motion is good, and it could be another reason why exercise is good for our brain health.”</p>
<p>To observe these microscopic movements, the authors used two-photon microscopy, which allows for high-definition imaging of living tissue. They examined 24 awake mice that had their heads temporarily secured in place above a spherical treadmill. The mice had a special transparent window surgically placed into their thinned skulls, which allowed the scientists to see the outer surface of the brain. </p>
<p>The scientists rapidly switched the microscope’s focus between glowing microscopic beads placed on the skull and specific cells within the brain tissue. They measured these shifts exactly, capturing video frames roughly forty times per second. The authors found that the brain shifted slightly forward and to the side during running. </p>
<p>Interestingly, the researchers observed the brain shifting in the moments before the mouse moved, but right after the tightening of the abdominal muscles needed to spur the body into further movement. Because the brain moved right before the legs did, the scientists suspected that the core muscles might be responsible. Sensors implanted in the mice recorded spikes in abdominal muscle activity that perfectly predicted the timing of the brain’s movement.</p>
<p>Drew, who also holds the title of associate director of the Huck Institutes of the Life Sciences at Penn State, explained how in a hydraulic system, a pump creates pressure that drives fluid flow. In this case, the pump is the abdominal contraction, which can be as light as the tensing prior to sitting up or taking a step.</p>
<p>To understand the physical connection, the scientists mapped the blood vessels connecting the belly to the spine. They injected a special dye into two mice and scanned the animals using microcomputed tomography, which enables high-resolution 3D examination of whole organs. The scans revealed a specialized network of veins called the vertebral venous plexus. </p>
<p>The contraction puts pressure on the vertebral venous plexus, a network of veins that connect the abdominal cavity to the spinal cavity, causing the brain to move. When abdominal muscles contract, they squeeze blood out of the belly and up into the spinal column. The added volume inside the spine pushes fluid upward, which creates a pressure wave that physically moves the brain.</p>
<p>To confirm that it was abdominal contractions rather than other movement that acted as the pump, the researchers applied gentle and controlled pressure to the abdomens of lightly anesthetized mice. They built a custom pneumatic belt, similar to a miniature blood pressure cuff. With no other movement other than a localized mechanical pressure less than a human would experience with a blood pressure cuff, the mice’s brains shifted.</p>
<p>“Importantly, the brain began moving back to its baseline position immediately upon relief of the abdominal pressure,” Drew said. “This suggests that abdominal pressure can rapidly and significantly alter the position of the brain within the skull.”</p>
<p>With the abdominal contraction-brain movement link confirmed, Drew said the next step was to understand the fluid’s movement in the brain and if the brain’s movement could induce fluid flow. However, there previously were no existing imaging techniques to visualize the rapid, nuanced dynamics of such fluid flows.</p>
<p>“Luckily, our interdisciplinary team at Penn State was able to develop these techniques, including conducting the imaging experiments of living mice and creating computer simulations of fluid motion,” Drew said. “That combination of expertise is so important for understanding these types of complicated systems and how they impact health.”</p>
<p>Francesco Costanzo, a professor of engineering science and mechanics, biomedical engineering, mechanical engineering and mathematics at Penn State, led the computational modeling. This model represented the simplified geometry of the mouse central nervous system. </p>
<p>“Modeling fluid flow in and around the brain offers unique challenges because there are simultaneous, independent movements, as well as time-dependent, coupled movements,” Costanzo said. “Accounting for all of them requires accounting for the special physics that happens every time a fluid particle crosses one of the many membranes in the brain.”</p>
<p>“So, we simplified it,” Costanzo said. “The brain has a structure similar to a sponge, in the sense that you have a soft skeleton and fluid can move through it.”</p>
<p>By simplifying the geometry of the brain to that of a sponge, Costanzo explained that the team could model how fluid flows through a structure with varied spaces, like wrinkles in the brain, or pores in the sponge. </p>
<p>“Keeping with the idea of the brain as a sponge, we also thought of it as a dirty sponge, how do you clean a dirty sponge?” Costanzo asked. “You run it under a tap and squeeze it out. In our simulations, we were able to get a sense of how the brain moving from an abdominal contraction can help induce fluid flow over the brain to help clear waste products.”</p>
<p>The simulation indicated that the sudden movement of the brain forces interstitial fluid, the liquid found in the microscopic spaces around cells, out of the brain tissue. This outward flow is the exact opposite of what happens during sleep, when fluid washes deeply into the brain to remove waste.</p>
<p>While these findings provide insights, there are a few limitations to consider. The experiments required the mice to have their heads held perfectly still. In a freely moving animal, the physical forces generated by moving the head up and down would also act on the brain, adding another layer of complexity. </p>
<p>Additionally, the scientists only imaged the very top portion of the brain’s cortex. Deeper brain regions tend to experience different types of stretching or shifting during abdominal contractions. The computer simulation also relied on a simplified geometry of the brain and spinal cord, which might not capture how fluids navigate the intricate real-world anatomy of the nervous system.</p>
<p>Drew emphasized that while more work is needed to understand the full implications in humans, this study suggests that body movement may help to cycle cerebrospinal fluid around and in the brain, removing waste and helping to protect against neurodegenerative disorders associated with waste buildup.</p>
<p>“This kind of motion is so small,” Drew said. “It’s what’s generated when you walk or just contract your abdominal muscles, which you do when you engage in any physical behavior. It could make such a difference for your brain health.”</p>
<p>The study, “<a href="https://doi.org/10.1038/s41593-026-02279-z" target="_blank">Brain motion is driven by mechanical coupling with the abdomen</a>,” was authored by C. Spencer Garborg, Beatrice Ghitti, Qingguang Zhang, Joseph M. Ricotta, Noah Frank, Sara J. Mueller, Denver I. Greenawalt, Kevin L. Turner, Ravi T. Kedarasetti, Marceline Mostafa, Hyunseok Lee, Francesco Costanzo, and Patrick J. Drew.</p></p>
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<td><a href="https://www.psypost.org/childhood-adhd-traits-linked-to-midlife-distress-with-societal-exclusion-playing-a-major-role/" style="font-family:Helvetica, sans-serif; letter-spacing:-1px;margin:0;padding:0 0 2px;font-weight: bold;font-size: 19px;line-height: 20px;color:#222;">Childhood ADHD traits linked to midlife distress, with societal exclusion playing a major role</a>
<div style="font-family:Helvetica, sans-serif; text-align:left;color:#999;font-size:11px;font-weight:bold;line-height:15px;">May 9th 2026, 06:00</div>
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<p><p>A recent study published in the journal <em><a href="https://doi.org/10.1038/s44220-026-00600-0" target="_blank">Nature Mental Health</a></em> suggests that children exhibiting high levels of attention deficit hyperactivity disorder traits are more likely to experience psychological distress up into middle age. The research provides evidence that this long-term mental health burden is partly driven by societal exclusion. Systemic barriers, such as limited access to healthcare, social support, and financial stability, seem to play a major role in this process. </p>
<p>Attention deficit hyperactivity disorder, commonly known as ADHD, is a condition involving differences in how a person manages attention, regulates activity levels, and controls impulses. Scientists recognize that individuals with ADHD often face higher risks of mental health challenges. Most previous research on this topic has heavily focused on childhood or early adulthood. </p>
<p>Amber John, a lecturer at the University of Liverpool, wanted to understand the different paths that mental health can take over a person’s entire lifespan. “There is growing recognition that ADHD is a lifelong condition, but much of the research still focuses on childhood and early adulthood,” John said. “I was interested in understanding how early ADHD-related traits might shape longer-term life experiences and outcomes, particularly in relation to social exclusion and psychological distress in midlife.” </p>
<p>The scientists also sought to identify the mechanisms driving this midlife distress. They focused on the concept of societal exclusion, which refers to the systemic disadvantages that prevent a person from fully participating in society. People with ADHD traits often encounter barriers in education, employment, and social settings due to environments that do not accommodate their needs. </p>
<p>To investigate these ideas, the researchers analyzed data from the 1970 British Cohort Study. A longitudinal cohort study is a research design that follows the exact same group of people over many years to observe how their lives change. This specific project has tracked the lives of individuals born in Great Britain during a single week in 1970. The final sample for the current analysis included 9,280 participants. </p>
<p>The authors measured childhood ADHD traits using behavior questionnaires completed by parents and teachers when the participants were 10 years old. These surveys included 14 specific questions that closely align with modern diagnostic criteria for ADHD, covering both hyperactivity and inattention. The researchers used statistical modeling to create a score reflecting the severity of ADHD traits for each child. They found that just over five percent of the sample met the strict threshold for high ADHD traits. </p>
<p>To measure psychological distress, the scientists used a survey called the Malaise Inventory Scale. This nine-question survey asks individuals to report feelings of depression, anxiety, and general mental well-being. Participants completed this questionnaire at five different points in their adult lives, specifically at ages 26, 30, 34, 42, and 46. </p>
<p>This repeated testing allowed the researchers to calculate a cumulative distress score. They identified how often people met the threshold for clinically relevant distress, which means their symptoms were severe enough to warrant medical attention. Tracking this distress across two decades provided a detailed map of how mental health evolves.</p>
<p>To evaluate societal barriers, the scientists measured societal exclusion when the participants reached 34 years old. They divided this exclusion into five specific categories to capture different areas of life. These distinct categories included health, relational, political, economic, and services exclusion. </p>
<p>Health exclusion involved reporting poor physical health, physical limitations, and low overall life satisfaction. Relational exclusion meant lacking emotional support networks, being single, or exhibiting a deep distrust of other people. Political exclusion referred to a lack of political engagement, such as not voting in elections or having no interest in civic matters. </p>
<p>Economic exclusion combined issues like financial instability, poverty, unemployment, and the need to borrow money from friends or pawnbrokers. Finally, services exclusion involved the participants rating their local public resources, such as public transport, police, and schools, as poor. The authors calculated summary scores for each of these five domains to measure an individual’s overall level of societal exclusion. </p>
<p>The researchers discovered four distinct patterns of psychological distress over time. These included a group with low or no distress, a group with moderate but decreasing distress, a group with low but increasing distress, and a group with persistently high distress. People who had high ADHD traits at age 10 were significantly more likely to fall into one of the higher distress groups rather than the low distress group. </p>
<p>The exact predictions highlighted a noticeable gap in mental health outcomes. The scientists calculated that people with high childhood ADHD traits had an estimated 27 percent chance of experiencing clinically relevant psychological distress by age 46. In contrast, those without high childhood ADHD traits had only an 18 percent chance of experiencing similar distress at that age. </p>
<p>The researchers also found that societal exclusion helped explain the connection between early ADHD traits and midlife distress. Childhood ADHD traits predicted greater societal exclusion at age 34 in every measured category. Experiencing health, relational, economic, and service exclusion then predicted higher psychological distress at age 46. Political exclusion was the only category that did not predict later mental health struggles. </p>
<p>John noted that these results point toward the power of environment. “One notable finding was that social exclusion appeared to in part contribute to the association between early ADHD traits and later distress,” John said. “This reinforces the idea that long-term negative outcomes are not inevitable in people with ADHD, but are influenced by potentially modifiable social factors.” </p>
<p>These findings suggest that adverse mental health outcomes are not simply an inevitable biological result of having ADHD. “Our findings suggest that early ADHD-related traits are linked to higher levels of psychological distress decades later, and that experiences of societal exclusion play an important role in this relationship,” John said. “This highlights that ADHD is not just about individual symptoms, it is also shaped by how people are supported (or not supported) by society.” </p>
<p>Limited access to secure jobs, good healthcare, and supportive relationships compounds over a lifetime, leading to higher levels of psychological pain. “Improving inclusion, access to opportunities, and support across the life course may help reduce long-term inequalities experienced by people with ADHD,” John said. This focus on societal barriers provides evidence that changing social structures might improve the long-term well-being of neurodivergent individuals. </p>
<p>While the study provides extensive evidence linking childhood ADHD traits to adult distress, it has some limitations. “As this is observational research, we cannot definitively establish cause and effect,” John said. “ADHD traits were measured in childhood rather than based on formal diagnosis, and social exclusion is a complex concept that cannot be fully captured by a single study.” </p>
<p>The scientists could not track whether a person’s symptoms naturally improved or worsened as they grew older. “We also do not have information about ADHD medication use,” John noted. “While we used a large, nationally representative cohort, findings may not generalize to all populations or contexts.” </p>
<p>The research relied on a cohort born in 1970, a time when public and medical awareness of ADHD was incredibly low. Very few participants likely received an official diagnosis or supportive treatments, such as specialized schooling or medication. The sample also lacked ethnic diversity, as less than three percent of the participants belonged to minority ethnic groups. Because systemic discrimination affects minority populations heavily, the relationship between ADHD, societal exclusion, and distress might look quite different in more diverse communities. </p>
<p>Future research tends to require exploring how receiving an official diagnosis or modern medication alters these mental health trajectories. “My broader research focuses on understanding inequalities and long-term outcomes for people with ADHD across the life course,” John said. “Next steps include looking at healthcare use, and aging, as well as identifying points where interventions could reduce disparities in people with ADHD.” </p>
<p>Scientists should also investigate the specific risk and protective factors that help some people with ADHD traits build resilience. “The goal is to inform policies and practices that better support people with ADHD throughout their entire lives,” John said. Finding ways to boost social belonging, improve early educational accommodations, and create inclusive workplaces could offer new pathways to support neurodivergent adults. </p>
<p>The authors hope this study encourages a shift in how society approaches neurodivergence. “A key message is that long-term outcomes for people with ADHD are not fixed,” John said. “With the right support, inclusive environments, and reduced stigma, there is real potential to improve life trajectories and mental health outcomes.” </p>
<p>The study, “<a href="https://doi.org/10.1038/s44220-026-00600-0" target="_blank">Childhood attention deficit hyperactivity disorder traits, societal exclusion and midlife psychological distress</a>,” was authored by Amber John, Elizabeth O’Nions, Lucy Corrigan, Joanne Cotton, Warren James Donnellan, Danielle Nimmons, Henry Shelford, Aphrodite Eshetu, Rob Saunders, Celine El Baou, Gavin R. Stewart, Rachael W. Cheung, Roopal Desai, Douglas GJ. McKechnie, Jae Won Suh, William Mandy, Darya Gaysina, Georgia Pavlopoulou, Philip Asherson, Jessica Agnew-Blais and Joshua Stott.</p></p>
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<td><a href="https://www.psypost.org/lsd-microdosing-linked-to-acute-mood-improvements-in-adults-with-depression/" style="font-family:Helvetica, sans-serif; letter-spacing:-1px;margin:0;padding:0 0 2px;font-weight: bold;font-size: 19px;line-height: 20px;color:#222;">LSD microdosing linked to acute mood improvements in adults with depression</a>
<div style="font-family:Helvetica, sans-serif; text-align:left;color:#999;font-size:11px;font-weight:bold;line-height:15px;">May 8th 2026, 20:00</div>
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<p><p>Taking tiny, frequent amounts of the psychedelic drug lysergic acid diethylamide (LSD) might temporarily elevate mood for people diagnosed with major depressive disorder. In a small pilot study, participants taking low, precise doses reported feeling more energetic, creative, and connected on days they took the drug. The research was published in the journal <a href="https://doi.org/10.1016/j.pnpbp.2026.111645"><em>Progress in Neuropsychopharmacology & Biological Psychiatry</em></a>.</p>
<p>Classic psychedelic compounds such as LSD are known for inducing profound changes in perception at high amounts. For decades, strict legal restrictions largely halted clinical research on these substances. Recently, scientific interest has renewed, and a practice called microdosing has gained popularity globally.</p>
<p>This practice involves taking very small amounts of a psychedelic substance. The amount is high enough to potentially alter brain chemistry but low enough to avoid causing hallucinations or severe cognitive disruptions. Many individuals practice microdosing on their own to self-medicate for mental health conditions, particularly depression.</p>
<p>Despite widespread anecdotal reports of psychological benefits, clinical trial data evaluating microdosing remain limited. Prior tests involving healthy volunteers suggested that low doses of LSD can acutely improve mood and increase feelings of sociability. This prompted researchers to investigate whether similar acute mood elevations occur in people actively experiencing depression. Dimitri Daldegan-Bueno, a pharmacy researcher at the University of Auckland in New Zealand, led the investigation along with several colleagues.</p>
<p>Major depressive disorder is a leading cause of disability worldwide. Symptoms go beyond sadness, encompassing a loss of interest in pleasurable activities, fatigue, and feelings of isolation. Standard psychiatric treatments frequently take weeks to become fully effective and do not relieve symptoms for everyone. Emerging research suggests that activating specific serotonin receptors in the brain with psychedelics might promote flexibility in brain signaling, offering a novel approach to treatment.</p>
<p>To test this approach, the research team enrolled nineteen adults who all met diagnostic criteria for major depression. They underwent an eight-week treatment regimen. The first session took place in a clinical laboratory. Participants were given a precise, eight-microgram dose of liquid LSD in a sublingual format. Sublingual administration involves holding the liquid under the tongue for about thirty seconds before swallowing.</p>
<p>During this initial session, scientists took multiple blood samples over six hours. This process allowed the research team to track the drug’s pharmacokinetics. Pharmacokinetics is a branch of pharmacology that focuses on how the body absorbs, distributes, and clears a drug from the bloodstream.</p>
<p>For the next phase of the trial, participants took the drug home. They consumed the sublingual liquid twice a week for the remainder of the eight weeks, totaling fifteen home doses. At home, they had the option to slowly raise or lower the amount of the drug they were taking. The permitted range for the drug was strictly capped between four and twenty micrograms.</p>
<p>To determine their individual ideal dose, participants answered daily questions on a customized smartphone application. If they felt the drug was interfering with their regular daily functioning, they were instructed to decrease the dose the next time. If they felt no psychological effects, they could slightly increase the dose during the next scheduled session.</p>
<p>The smartphone program also tracked a variety of psychiatric metrics. Every evening, participants filled out a short survey evaluating their sleep quality from the night before. They rated their mental state using visual analog scales. A visual analog scale is a measuring tool that asks users to specify their level of agreement along a continuous line rather than selecting a rigid multiple-choice option. Within the program, participants rated how connected, creative, energetic, happy, irritable, and jittery they felt that day.</p>
<p>Looking at the data across the eight weeks, daily mood improved in specific patterns. On the specific days they consumed the microdose, participants logged higher levels of creativity, energy, and social connectedness compared to the days immediately following the dose. On the first and second days after taking the drug, participants reported feeling happier. In addition, irritability scores dropped two days after consuming the dose.</p>
<p>These acute improvements in mood could theoretically counter some of the core symptoms of major depressive disorder. A common feature of depression is anhedonia, which is an inability to feel pleasure or find motivation to engage in social activities. If a patient feels a temporary surge in creative energy and social connection, they might be more likely to participate in positive social behaviors. Engaging in rewarding activities can create a positive feedback loop that helps lift a depressed mood over time.</p>
<p>Despite these daily mood boosts, the daily depression questionnaire used in the app did not yield statistically significant changes based on the dosing schedule. The researchers suspect this was a measurement issue. The specific questionnaire they used asked participants to evaluate their depression symptoms over the preceding three days. Because they filled this out every single day, the answers overlapped, making it difficult to isolate the effect of a single dosing day. A separate, formal clinical interview conducted at the end of the entire trial showed an average drop in depression severity of sixty percent across the group.</p>
<p>The blood analysis from the laboratory sessions provided detailed data on how the human body processes microdoses of this specific substance. On average, the drug reached its peak concentration in the blood just over an hour after sublingual administration. This timing aligns closely with the onset of psychological effects reported by the participants.</p>
<p>The pharmacokinetic data also revealed individual variations in how the drug was metabolized. When researchers compared the blood test results to the home dosing adjustments, they noticed a physiological pattern. Participants who naturally processed the drug faster, resulting in lower peak concentrations in their blood, were more likely to gradually increase their home doses over the eight weeks.</p>
<p>Conversely, those with higher blood concentrations from the standard lab dose tended to keep their home doses lower. This suggests that participants were successfully adjusting their drug intake to achieve a consistent subjective effect, compensating for their unique internal metabolism.</p>
<p>The daily surveys also asked participants to rate the strength of the drug’s effects across the fifteen home sessions. Participants did not report the drug feeling weaker or stronger over the eight weeks. This finding is notable in pharmacology. Many psychiatric substances cause tolerance, where the brain adapts and requires more of the drug to achieve the same effect. Other drugs cause sensitization, where repeated use leads to stronger reactions. In this trial, the perceived effects remained entirely stable, indicating no rapid tolerance or sensitization to the repeated low doses of the drug.</p>
<p>While these results might appear promising for the field of psychiatric research, the study design has severe limitations. It was an uncontrolled, open-label pilot trial. Every single participant knew they were diagnosed with depression and knew they were receiving LSD. In psychiatric research, participant expectations often exert a massive influence on the reported outcomes. A participant hoping for relief from depression might unconsciously report better moods simply because they believe the treatment will work.</p>
<p>This psychological phenomenon is known as the placebo effect. Without a control group receiving an inactive substance for comparison, scientists cannot definitively isolate the chemical effects of the drug from the psychological effects of undergoing a novel treatment. The excitement of participating in a supportive clinical trial can elevate a person’s mood independently of any pharmacological intervention.</p>
<p>Additionally, the demographics of the group were limited. The trial included only nineteen individuals, most of whom identified as male. A larger sample size is required to ensure these behavioral patterns hold true for the general adult population. Most of the participants were also taking standard prescription antidepressants simultaneously, meaning the drug’s effects were interacting with existing medications.</p>
<p>Because of these limitations, the research team emphasized that these findings must be viewed as strictly exploratory. The data successfully proved that patients can safely manage their own microdosing regimen at home with remote monitoring. However, proving the clinical efficacy of this treatment will require randomized, double-blind trials. In those future studies, researchers will compare an active drug group against a placebo group. Only then can scientists determine if tiny amounts of psychedelics are a true medical asset for treating major depressive disorder.</p>
<p>The study, “<a href="https://doi.org/10.1016/j.pnpbp.2026.111645">LSD microdosing for major depressive disorder: Mood and pharmacokinetic outcomes from a Phase 2a trial</a>,” was authored by Dimitri Daldegan-Bueno, Carina Joy Donegan, Rachael Sumner, Anna Forsyth, Soo Hee Jeong, William Evans, Malak Alshakhouri, Robin J. Murphy, Lisa Reynolds, Nicholas Hoeh, Nathan Allen, Frederick Sundram, David B. Menkes, and Suresh Muthukumaraswamy.</p></p>
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<td><a href="https://www.psypost.org/new-brain-scan-index-detects-hidden-alzheimer-s-patterns-before-memory-loss-begi/" style="font-family:Helvetica, sans-serif; letter-spacing:-1px;margin:0;padding:0 0 2px;font-weight: bold;font-size: 19px;line-height: 20px;color:#222;">New brain scan index detects hidden Alzheimer’s patterns before memory loss begins</a>
<div style="font-family:Helvetica, sans-serif; text-align:left;color:#999;font-size:11px;font-weight:bold;line-height:15px;">May 8th 2026, 18:00</div>
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<p><p>Researchers have created a new mathematical method for analyzing standard brain scans to predict the onset of Alzheimer’s disease long before symptoms appear. By rating how closely an individual’s brain matches the structural patterns typical of the disease, this new tool can track the hidden impacts of genetic and cardiovascular risks in healthy adults. The research was published in the journal <a href="https://doi.org/10.1038/s41380-026-03617-0"><i>Molecular Psychiatry</i></a>.</p>
<p>Alzheimer’s disease is the leading cause of cognitive decline in older adults. The gradual changes that lead to the condition begin in the brain decades before the first signs of memory loss or confusion. This long preclinical period provides a window of opportunity for medical interventions aimed at delaying or preventing the disease.</p>
<p>Existing methods for detecting these early changes often rely on specialized and expensive techniques. Doctors look for specific proteins using radioactive tracers in positron emission tomography scans, or they test spinal fluid and blood. While these methods are highly accurate, they can be invasive and are not always practical for screening the broader public.</p>
<p>Standard magnetic resonance imaging offers a noninvasive and widely available brain scanning alternative. However, typical visual signs of the disease on these common scans, such as the shrinking of specific brain folds or the widening of fluid cavities, are not very sensitive. These visible changes usually show up only after memory problems have already started.</p>
<p>A team of scientists led by Peter Kochunov and L. Elliot Hong at the University of Texas Health Science Center at Houston sought an earlier warning sign. They developed a software measurement called the Regional Vulnerability Index. This analytical tool evaluates the entire brain structure all at once.</p>
<p>To create the index, the researchers first established a universal blueprint of how the disease physically alters the brain over time. They analyzed brain scans from people diagnosed with the disease who had a confirmed buildup of toxic proteins. They compared these scans to those of healthy adults to map out the typical regional deficits across the organ.</p>
<p>The resulting index scores the mathematical similarity between any individual’s brain scan and the established disease blueprint. Instead of just looking at the size of the hippocampus, the brain’s central memory structure, the formula looks at widespread structural relationships. A higher score means an individual’s brain pattern closely resembles the pattern expected in dementia.</p>
<p>The researchers wanted to see if this index could capture the lifelong impacts of two major risk factors for cognitive decline. They looked at a gene associated with cholesterol transport, known as the apolipoprotein E gene. People who inherit the variant of this gene known as E4 have a significantly higher risk of developing dementia as they age.</p>
<p>They also examined cardiovascular health, which plays a major role in brain aging. Conditions like high blood pressure, high cholesterol, and diabetes can slowly damage the blood vessels that supply the brain with oxygen and nutrients. To measure this burden, the team calculated a standard cardiovascular risk score for each study participant.</p>
<p>The scientists tested their approach on two large groups of neurologically healthy adults. The goal was to see if the index could detect the influence of the genetic and cardiovascular risk factors before any cognitive issues developed. The first group served as an initial discovery sample to test the mathematical concept.</p>
<p>This initial group included 343 healthy adults from the Amish Connectome Project. This population is highly uniform in both genetics and environment. They share a rural farming lifestyle with very low rates of alcohol or tobacco use, which helps researchers isolate the effects of the specific disease risk factors being studied.</p>
<p>To replicate their findings, the team then evaluated a massive secondary sample from the UK Biobank dataset. This collection included more than 31,000 healthy participants from various urban and suburban environments. Testing the index across vastly different living conditions helped prove the robustness of the structural imaging measurement.</p>
<p>In both study groups, healthy adults who carried the high-risk gene variant had significantly higher brain index scores than noncarriers. Their brains were already displaying subtle structural patterns associated with the disease. This was true even though these participants had no outward neurological symptoms and performed normally on cognitive tests.</p>
<p>When the researchers checked individual brain structures the traditional way, they found very few structural differences between the people with the high-risk gene and those without it. Simple volume measurements of the memory centers or the outer folds of the brain did not reveal the underlying genetic risk. The mathematical index proved highly sensitive to hidden patterns that a basic volume check missed.</p>
<p>The study also revealed an interaction between genetic inheritance and cardiovascular health. In participants carrying the high-risk genetic variant, a higher cardiovascular risk score strongly correlated with an elevated brain index score. The two risk factors seemed to combine to push the brain’s physical structure closer to a disease-like state.</p>
<p>In contrast, higher cardiovascular risk scores did not significantly raise the brain index in participants without the genetic risk factor. The researchers noted that simply carrying the gene variant did not cause poor cardiovascular metrics like high blood pressure. Instead, poor cardiovascular health appeared to affect the brain much more severely in those with a localized genetic vulnerability.</p>
<p>After proving the index worked in healthy adults, the scientists investigated whether it could predict future cognitive decline in a higher-risk population. They utilized medical records from the Alzheimer’s Disease Neuroimaging Initiative. This long-term database tracks the neurological health of older adults over many years.</p>
<p>The researchers focused on nearly 2,000 older adults with an average age of 74. About half of these participants had mildly impaired cognition at the start of the assessment. Mild cognitive impairment represents a state of slight memory or thinking decline that often serves as a transitional stage between normal aging and full dementia.</p>
<p>The team tracked these participants for up to a decade. They found that individuals with mild cognitive impairment who eventually worsened and developed full dementia had significantly higher baseline index scores. The index successfully differentiated the patients who would experience rapid decline from those who would remain stable over the years.</p>
<p>The predictive power of the mathematical score was strongest in the short term. High baseline index scores reliably predicted new transitions to dementia within the first three years after the initial brain scan. As the time frame stretched further into the future beyond three years, the accuracy of predicting a patient’s outcomes based on a single baseline scan gradually declined.</p>
<p>Importantly, participants with mild cognitive impairment who did not progress to dementia had lower index scores. Their brain patterns were statistically similar to those of completely healthy older adults. A low index score suggested a much safer neurological trajectory for the decade ahead.</p>
<p>The researchers noted a few boundaries to their findings. The three participant groups had vastly different environmental backgrounds, which introduces some statistical noise into the data. While the Amish participants lived in rural settings with few harmful habits, the other groups represented modern urban populations with more typical health variations.</p>
<p>Additionally, the basic anatomical maps used to calculate the vulnerability index were standard medical tools. They were not explicitly built to highlight the exact regions of the brain that shrink during an abnormal protein buildup. By developing specialized structural maps in the future, scientists might be able to make the index even more sensitive to hidden tissue changes.</p>
<p>The team did not directly compare the accuracy of their index against the current standard screening tool, the positron emission tomography scan. Future studies will need to place these two screening methods head-to-head to determine which is more reliable. They will also need to test how the new brain index performs alongside advanced blood tests.</p>
<p>If validated by other laboratories, this mathematical approach could transform standard medical imaging for older adults. A routine hospital brain scan could be fed into a software program to evaluate a patient’s hidden neurological risks. Such noninvasive screening would help doctors find vulnerable patients early enough to offer preventative treatments before memory loss becomes permanent.</p>
<p>The study, “<a href="https://doi.org/10.1038/s41380-026-03617-0">Alzheimer’s disease-like brain pattern biomarker: capturing risks and predicting disease onset</a>,” was authored by Peter Kochunov, Si Gao, Lauren E. Salminen, Neda Jahanshad, Talia M. Nir, Paul M. Thompson, Xiaoming Du, Bhim M. Adhikari, Alice Kochunov, Ryan Cassidy, Yizhou Ma, Joshua Chiappelli, Seth Ament, Yezhi Pan, Shuo Chen, Alan R. Shuldiner, Braxton D. Mitchell, L. Jair Soares, and L. Elliot Hong.</p></p>
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<td><a href="https://www.psypost.org/proactive-habits-can-boost-cognitive-and-emotional-well-being-across-the-adult-lifespan/" style="font-family:Helvetica, sans-serif; letter-spacing:-1px;margin:0;padding:0 0 2px;font-weight: bold;font-size: 19px;line-height: 20px;color:#222;">Proactive habits can boost cognitive and emotional well-being across the adult lifespan</a>
<div style="font-family:Helvetica, sans-serif; text-align:left;color:#999;font-size:11px;font-weight:bold;line-height:15px;">May 8th 2026, 16:00</div>
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<p><p>A recent study reveals that adults of all ages can meaningfully improve their cognitive, emotional, and social well-being through brief, daily mental exercises. Published in the journal <a href="https://doi.org/10.1038/s41598-026-51403-3" target="_blank">Scientific Reports</a>, the research suggests that mental decline is not an inevitable part of aging, offering a proactive approach to extending the period of life spent with a healthy, highly functioning mind.</p>
<p>Over the past century, advancements in medicine and public health have doubled the average human lifespan. This extension in years lived, however, has not always been matched by an equal extension in brain health span. The brain health span is the period of life during which a person maintains strong cognitive abilities, emotional balance, and a sense of social connection.</p>
<p>Researchers want to align our mental vitality with our physical longevity. Lori G. Cook, a clinical researcher at the Center for BrainHealth at The University of Texas at Dallas, led a team to investigate whether proactive habits could enhance brain function over time. Their work stems from the concept of neuroplasticity, which is the brain’s inherent ability to rewire itself, form new connections, and adapt at any age.</p>
<p>Historically, medical professionals have focused on detecting cognitive decline and treating brain diseases after symptoms appear. Most screening tools are designed strictly to identify deficits, leaving a gap in our ability to measure and promote optimal mental performance in healthy individuals. Current models typically rely on comparing a patient to an average baseline, rather than looking at an individual’s personal potential.</p>
<p>Cook and her colleagues sought to change this by creating a framework focused on continual growth rather than mere disease prevention. Just as cardiologists promote diet and exercise to maintain heart health long before a heart attack occurs, these researchers propose a similar preventative model for the mind. They argue that taking steps to optimize the brain should be a lifelong public health priority.</p>
<p>To address this gap, the team launched a large online initiative called the BrainHealth Project. They wanted to determine if providing people with accessible digital tools could help them track and boost their holistic brain fitness over several years. The team theorized that by teaching specific mental strategies, people could take charge of their own mental performance, regardless of their starting point.</p>
<p>The researchers tracked nearly 4,000 adults, ranging in age from 19 to 94, over a three-year period. Every six months, participants completed the BrainHealth Index, an online assessment developed by the research team. This tool measures three core areas of mental function: clarity, connectedness, and emotional balance.</p>
<p>Clarity refers to problem-solving and reasoning skills, which allow people to navigate complex situations. Connectedness reflects social engagement and a person’s sense of purpose in their community. Emotional balance captures how well an individual manages stress, anxiety, and mood fluctuations in daily life.</p>
<p>After taking the initial assessment, participants gained access to an online dashboard filled with short, interactive training modules. These brief lessons taught cognitive strategies based on a program developed by the research center. Rather than using repetitive memory games, the training focused on higher-level executive functions, which are the mental skills used to plan, focus attention, and juggle multiple tasks.</p>
<p>For example, participants learned how to filter out unnecessary distractions, synthesize complex reading materials into core messages, and approach daily problems from multiple distinct perspectives. The platform also provided personalized coaching sessions via video call. During these sessions, coaches helped participants interpret their assessment scores and set personal goals.</p>
<p>The digital platform encouraged users to track daily habits that support mental fitness. These included getting enough sleep, managing stress through relaxation techniques, and setting aside uninterrupted blocks of time for focused work. The system offered daily reminders and virtual rewards to keep participants motivated over the long haul.</p>
<p>The researchers looked at how individuals’ scores changed over time based on their level of engagement with the platform. They categorized participants into low, modest, and high utilization groups depending on how often they completed the training modules, logged their daily habits, and attended coaching sessions. By tracking these different levels of participation, the team could evaluate whether putting more effort into the program translated to better mental outcomes.</p>
<p>The collected data indicated that people across the adult lifespan can measurably enhance their mental performance. Participants who actively used the platform saw substantial improvements in their overall brain health scores. These gains were seen in both the complete index score and its individual components of clarity, connectedness, and emotional balance.</p>
<p>“For too long, we’ve operated under the outdated notion that we need to wait until something bad happens to our brain before we do anything for it,” said Sandra Bond Chapman, a co-author of the study and chief director of the Center for BrainHealth. “This study reminds us that our brain is not defined by age, it is defined by possibility.”</p>
<p>Age did not dictate a person’s ability to benefit from the program. Younger adults in their twenties and thirties achieved improvements on par with those in their seventies and eighties. This finding challenges the common assumption that proactive brain care is primarily a concern for older generations. It supports the idea that building mental resilience should begin early in adulthood.</p>
<p>The data also revealed a distinct pattern among those who started the study with the lowest brain health scores. These individuals experienced the largest rate of improvement over the three years. The researchers noted that a low starting point is not a permanent state, and targeted exercises can help close the performance gap between struggling individuals and high achievers.</p>
<p>Consistency proved to be a major factor in driving these positive outcomes. Participants in the high utilization group achieved the most pronounced gains, establishing a clear link between regular mental exercise and improved cognitive function. Even individuals who initially rarely used the platform but later increased their participation saw their scores rise accordingly.</p>
<p>The researchers believe that learning these mental strategies gave participants a stronger sense of self-agency, which is the feeling of being in control of one’s own actions and health. By realizing they had the power to change their own thought patterns, participants became more motivated to stick with their new habits. This likely created a positive cycle of continuous mental improvement.</p>
<p>“Every brain is as unique as a fingerprint and has potential for growth,” Cook said. “By moving away from one-size-fits-all solutions, we are empowering people with a personalized blueprint and the agency to continuously invest in their brain health and performance.”</p>
<p>While the outcomes are promising, the study has certain limitations. The research was designed as a single group trial without a randomized control group. This means all participants had access to the interventions, making it difficult to completely rule out external factors that might have influenced their progress.</p>
<p>Additionally, the participant pool lacked broad demographic diversity. The majority of the individuals involved were highly educated and predominantly white. Because participants volunteered for the study, they may have already possessed a high level of personal motivation to improve their health, which could sway the final numbers.</p>
<p>The research took place during the height of the COVID-19 pandemic, which may have impacted the results. Pandemic-related stress, illness, and social isolation likely affected participants’ baseline feelings of connectedness and emotional balance. The research team has since updated their questionnaires to track major health events like viral infections.</p>
<p>Future research will need to focus on recruiting a more diverse group of participants to ensure the findings apply to the general population. The team is also working on integrating objective health markers, such as data from wearable fitness devices and sleep trackers, to corroborate the self-reported survey results. They also plan to use magnetic resonance imaging to look for physical changes in the brain that correspond to the improved test scores. These ongoing efforts aim to build a more comprehensive understanding of cognitive longevity. </p>
<p>The study, “<a href="https://doi.org/10.1038/s41598-026-51403-3" target="_blank">Measuring and increasing the brain health span across adulthood: a public health imperative</a>,” was authored by Lori G. Cook, Jeffrey S. Spence, Zhengsi Chang, Erin E. Venza, Aaron Tate, Ian H. Robertson, Mark D’Esposito, Geoffrey S. F. Ling, Jane G. Wigginton and Sandra Bond Chapman.</p></p>
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<td><a href="https://www.psypost.org/how-a-stick-of-caffeinated-gum-changes-the-brain-s-electrical-braking-system/" style="font-family:Helvetica, sans-serif; letter-spacing:-1px;margin:0;padding:0 0 2px;font-weight: bold;font-size: 19px;line-height: 20px;color:#222;">How caffeine alters the human brain’s electrical braking system</a>
<div style="font-family:Helvetica, sans-serif; text-align:left;color:#999;font-size:11px;font-weight:bold;line-height:15px;">May 8th 2026, 14:00</div>
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<p><p>A new study reveals that consuming an amount of caffeine equivalent to two cups of coffee enhances the brain’s ability to temporarily quiet its own motor signals in response to sensory input. The results indicate that everyday habits can alter neurological test readouts, which has implications for diagnosing certain cognitive conditions. The research was published in the journal <i><a href="https://doi.org/10.1016/j.clinph.2026.2111857">Clinical Neurophysiology</a></i>.</p>
<p>Measuring the electrical activity of the living human brain presents unique challenges. Neurologists often rely on noninvasive techniques to safely probe how different brain regions communicate. One common tool is transcranial magnetic stimulation, which involves placing an electromagnetic coil against a person’s scalp. The coil delivers brief magnetic pulses through the skull and into the underlying nervous tissue.</p>
<p>When positioned over the primary motor cortex, these magnetic pulses generate weak electrical currents that trigger downward signals to the body. This neural pathway travels down the spinal cord and out to the peripheral nerves. If the stimulation is strong enough, it forces a specific muscle to twitch, such as the muscle located at the base of the thumb. Neurologists measure the physical size of this muscle twitch to gauge the baseline excitability of the brain’s motor networks.</p>
<p>Researchers also use this technique to study how the brain processes incoming sensory information alongside outgoing movement commands. They employ a specific testing protocol called short-latency afferent inhibition. In this protocol, an examiner delivers a mild electrical shock to a nerve at the wrist shortly before sending the magnetic pulse into the brain.</p>
<p>The sensory signal from the wrist travels up the arm and enters the brain’s somatosensory area. Milliseconds later, the magnetic pulse hits the nearby motor cortex to trigger the thumb twitch. The arrival of the sensory signal acts like a temporary brake on the motor cortex. The resulting muscle twitch ends up being much smaller than it would have been without the preceding wrist shock.</p>
<p>This fleeting suppression requires a coordinated effort among specific chemical messengers in the brain. Researchers suspect that acetylcholine and gamma-aminobutyric acid, widely known as GABA, manage this inhibitory braking system. By measuring the strength of this suppression, doctors can evaluate the overall health of the brain’s neurochemical networks.</p>
<p>Lead author Camilla Carrozzo, a researcher affiliated with the Campus Bio-Medico University of Rome, wanted to understand how common dietary stimulants affect these delicate measurements. Millions of people consume caffeine daily to improve alertness and alleviate fatigue. At typical doses, caffeine alters brain function by blocking receptors for adenosine, a chemical that normally promotes sleepiness.</p>
<p>Blocking adenosine sets off a chain reaction in the central nervous system. It increases the release of other neurotransmitters, including acetylcholine and glutamate, which elevate overall neural excitability. Carrozzo and her team sought to determine if elevated acetylcholine from consuming caffeine might alter the brain’s short-term braking system during neurological testing.</p>
<p>The research team recruited twenty healthy adults ranging in age from 20 to 42 for a controlled experiment. The participants agreed to abstain from all caffeinated beverages for 12 hours before the testing sessions. The researchers tested each participant on two separate days, scheduling the experiments at the same time of day to avoid natural fluctuations in daily brain activity.</p>
<p>On one day, participants chewed a piece of military-grade energy gum containing 200 milligrams of caffeine. This amount is roughly equivalent to a strong cup of brewed coffee or a standard energy drink. On the other day, they chewed an identical placebo gum containing no active ingredients. The trial used a double-blind design, meaning neither the participants nor the examiners knew which gum was being chewed on any given day.</p>
<p>The participants chewed the gum for ten minutes, which allowed the chemical to absorb rapidly through the lining of the mouth and the stomach. The brain stimulation experiments began 30 minutes after chewing started, to ensure the stimulant had reached peak concentrations in the bloodstream.</p>
<p>During the sessions, the investigators measured the brain’s sensory-motor braking system using two distinct technical approaches. The first approach relies on a constant magnetic stimulus. The examiner utilizes a fixed magnetic strength and records how much the muscle twitch shrinks in size when the sensory shock precedes it.</p>
<p>The second approach flips this logic and relies on a variable magnetic stimulus. Instead of watching the muscle twitch change in size, the tracking software dynamically adjusts the magnetic power to force the muscle to twitch at a consistent target size every time. The researchers calculate inhibition by noting how much extra magnetic power is required to overcome the sensory braking effect.</p>
<p>The findings varied depending on the measurement technique used to record the brain signals. When the researchers analyzed the data from the constant-stimulus approach, they observed an enhancement in the brain’s braking power. The caffeine gum strengthened the sensory system’s ability to suppress the motor cortex compared to the placebo gum.</p>
<p>This heightened suppression was most obvious at very specific timing parameters. The enhanced braking effect peaked when the sensory pulse preceded the magnetic pulse by exactly 19 to 21 milliseconds. The results indicated that the dose of caffeine altered how the participants’ brains integrated feeling and movement.</p>
<p>The second measurement technique yielded different results. When the equipment adjusted the magnetic intensity to maintain a constant muscle twitch size, the researchers did not find any measurable differences between the caffeinated days and the placebo days. For this specific protocol, the calculated differences in inhibition were not statistically significant.</p>
<p>The scientific team also noticed a shift in the brain’s general baseline excitability. Following caffeine consumption, the minimum magnetic strength required to produce a large muscle twitch dropped. This suggests the motor cortex became more responsive to external stimulation overall. However, the threshold required to produce a much smaller baseline muscle twitch did not change.</p>
<p>The researchers attribute the conflicting results between the two testing methods to differences in underlying brain physiology. The constant-stimulus method required a higher baseline magnetic power to generate the initial muscle twitches. Higher intensities recruit larger populations of nerve cells deep within the motor cortex.</p>
<p>The authors propose that caffeine might selectively influence these deeper, late-responding neural circuits. The tracking method, which used weaker magnetic pulses, might not have activated those specific cellular networks. The divergent results could simply reflect the fact that the two protocols probe slightly different functional pathways within the brain.</p>
<p>The investigators note a few caveats to their current work that require future exploration. The experiment relied on a single fixed dose of the stimulant, meaning it remains unknown how a larger or smaller amount might influence the results. The sample size was also relatively small and limited exclusively to healthy young adults with no neurological complaints.</p>
<p>Because even moderate caffeine consumption alters certain readouts of brain function, doctors should likely advise patients to abstain from coffee before undergoing these specific diagnostic tests. Taking the tests with a caffeine-altered brain could mask underlying abnormalities or produce inaccurate clinical assessments. Controlling for dietary habits helps ensure the accuracy of the data.</p>
<p>Moving forward, the research team hopes to evaluate these dynamics in populations dealing with cognitive decline. In individuals with Alzheimer’s disease or Parkinson’s disease, the brain’s ability to suppress motor signals after sensory input is often reduced. This reduction mirrors the gradual loss of the brain’s cholinergic signaling networks in these specific conditions.</p>
<p>Caffeine naturally boosts some of the same chemical transmitters that these neurodegenerative diseases slow down or destroy. Investigating how the brains of patients with Alzheimer’s respond to caffeinated stimulation could help researchers refine diagnostic tools. This information might eventually improve how doctors track the physical progression of cognitive disorders over time.</p>
<p>The study, “<a href="https://doi.org/10.1016/j.clinph.2026.2111857">The effects of caffeine on short-latency afferent inhibition measured with paired-pulse conventional and threshold-tracking TMS</a>,” was authored by Camilla Carrozzo, Martina Cannazza, Diletta Fratini, Gaia Fanella, Bulent Cengiz, Vincenzo Di Lazzaro, Gintaute Samusyte, and Hatice Tankisi.</p></p>
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<td><a href="https://www.psypost.org/men-objectify-women-more-when-sexually-aroused-regardless-of-their-underlying-personality-traits/" style="font-family:Helvetica, sans-serif; letter-spacing:-1px;margin:0;padding:0 0 2px;font-weight: bold;font-size: 19px;line-height: 20px;color:#222;">Men objectify women more when sexually aroused, regardless of their underlying personality traits</a>
<div style="font-family:Helvetica, sans-serif; text-align:left;color:#999;font-size:11px;font-weight:bold;line-height:15px;">May 8th 2026, 12:00</div>
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<p><p>A recent study suggests that temporary states of sexual arousal can cause men to sexually objectify women, shifting their focus toward sexualized physical traits and away from psychological characteristics. This shift happens independently of a man’s general personality traits, providing evidence that momentary biological states play a central role in how people perceive others. The study was published in <em><a href="https://doi.org/10.1080/00224499.2026.2658752" target="_blank">The Journal of Sex Research</a></em>.</p>
<p>The authors of the new study sought to better understand the immediate, short-term causes of sexual objectification. Sexual objectification happens when a person is reduced to their sexual function, and their mental and emotional characteristics are ignored. In heterosexual contexts, women predominantly suffer the negative consequences of this behavior, including reduced self-esteem, feelings of anger, and depression.</p>
<p>Past research has focused heavily on stable personality traits to explain why men objectify women. These traits include characteristics like narcissism, psychopathy, and a preference for social dominance. Many existing theories also view objectification primarily as a tool men use to assert power and maintain dominance over women. </p>
<p>While those personality and power dynamics remain relevant, the authors suggest that current theories might miss an important piece of the puzzle by ignoring temporary physical states. <a href="https://www.linkedin.com/in/arnaud-wisman-771b12102/" target="_blank">Arnaud Wisman</a>, a lecturer in psychology at the <a href="https://www.kent.ac.uk/school-of-psychology/people/255/wisman-arnaud" target="_blank">University of Kent</a>, focuses his research on how evolutionary concepts apply to social psychology. “A central idea in my work is that sexual arousal is relatively underestimated as a driver of human motivation and cognition, likely in part because it remains a socially sensitive or taboo topic,” Wisman explained.</p>
<p>The researchers proposed the Arousal Hypothesis of Sexual Objectification. This hypothesis posits that humans evolved to pay attention to physical traits associated with mating when they are sexually aroused. “From an evolutionary perspective, however, sexual motivation is fundamental to the survival of the species, so we would expect it to have a powerful influence on cognition and behavior,” Wisman noted.</p>
<p>According to this evolutionary perspective, focusing on physical attributes during moments of arousal historically helped ancestors evaluate potential mates and orient themselves toward reproduction. The researchers wanted to test whether this temporary mating mindset directly increases objectification, regardless of a man’s underlying personality. “Much of my recent research therefore focuses on how sexual arousal shapes perception, judgment, and decision-making in systematic ways,” Wisman said.</p>
<p>To explore this hypothesis, Wisman and his colleague, Andrew G. Thomas, conducted four separate experiments involving a total of 675 heterosexual men. In the first experiment, the researchers recruited 154 men through an online platform. The participants first completed questionnaires assessing their baseline mood and their willingness to engage in casual sex without commitment. </p>
<p>The men also completed a survey measuring Dark Triad traits. The Dark Triad refers to three personality traits associated with manipulative and callous behavior, which are Machiavellianism, narcissism, and psychopathy. Afterward, the participants were randomly assigned to one of two visual conditions. </p>
<p>In the sexual arousal condition, the men viewed 15 erotic images and 15 erotic animated images. In the neutral arousal condition, participants viewed images of people engaging in arousing but non-sexual activities, like bungee jumping or cliff diving. This allowed the scientists to separate the effects of sexual arousal from general excitement. </p>
<p>Afterward, the participants completed a task designed to measure their current state of sexual objectification. In this task, the men rated how desirable they found ten physical sexual attributes, such as being curvy, compared to ten mental attributes, such as intelligence and empathy. The researchers found that sexually aroused men showed a greater preference for women’s sexual physical attributes over psychological ones. </p>
<p>This effect remained significant even when the scientists controlled for the participants’ relationship status and Dark Triad traits. “One notable finding was that the effect of sexual arousal emerged even when controlling for personality traits,” Wisman explained. “This suggests that situational factors can play a substantial role independently of stable individual differences, which are often the primary focus in this area of research.”</p>
<p>The second experiment aimed to refine these findings by testing whether sexual arousal simply makes men more interested in human bodies in general. The researchers recruited 160 heterosexual men and followed a similar procedure as the first experiment. This time, the objectification task included neutral physical attributes, such as knees and elbows, alongside the sexualized physical traits and mental traits. </p>
<p>The authors found that sexual arousal did not increase the men’s preference for neutral physical attributes. Instead, the heightened arousal specifically increased their preference for sexualized physical traits compared to mental characteristics. Once again, personality traits predicted higher overall levels of objectification, but they did not alter the direct impact of the sexual arousal manipulation.</p>
<p>In the third experiment, the scientists explored the difference between temporary states of objectification and stable personality traits. They recruited another 160 heterosexual men and included a measure of social dominance orientation. This concept describes a person’s preference for inequality among social groups, where some groups are at the top and others are at the bottom. </p>
<p>Alongside the task measuring temporary objectification, the participants also completed a questionnaire measuring their general, everyday tendency to objectify women. The researchers found that viewing the erotic images increased temporary state objectification, replicating the previous two experiments. However, the sexual arousal manipulation did not change the men’s scores on the general trait objectification questionnaire. </p>
<p>This finding provides evidence that sexual objectification is not just a fixed personality trait. Instead, it is also a dynamic state that fluctuates based on immediate motivational contexts, such as feeling sexually aroused. “Our findings suggest that objectification can, in some contexts, reflect a shift in perceptual focus toward physical features relevant for sexual attraction,” Wisman noted. “In this sense, it is not simply a stable trait, but a state-dependent process linked to underlying motivational systems such as sexual arousal.”</p>
<p>The fourth experiment tested whether an empathy exercise could reduce the objectifying effects of sexual arousal. The researchers recruited 201 heterosexual men. In addition to the arousal manipulation, the participants were randomly assigned to either an empathy condition or a neutral control condition. </p>
<p>In the empathy condition, the men were asked to write about a recent situation where a woman experienced a challenge, focusing on how she might have felt. In the neutral condition, the participants simply described the room they were currently sitting in. The scientists also measured the men’s Dark Triad traits and their casual sexual attitudes. </p>
<p>The researchers found that the empathy exercise generally reduced sexual objectification. When accounting for Dark Triad traits, empathy appeared to buffer the impact of sexual arousal. For men in the neutral writing condition, sexual arousal predicted increased objectification. </p>
<p>For men in the empathy condition, this link between arousal and objectification disappeared. However, the men who scored very high in Dark Triad traits exhibited high levels of objectification regardless of the empathy exercise or their state of arousal. This suggests that empathy interventions might be promising, but their success tends to depend on a person’s underlying capacity for empathy.</p>
<p>While this research provides new insights, it has a few potential limitations. The researchers focused exclusively on heterosexual men, as men are most often the agents of objectification in heterosexual contexts. “Importantly, emerging research indicates that this mechanism is not necessarily limited to men; under certain conditions, women may also show increased attention to male physical attributes,” Wisman said. “At the same time, it is essential to distinguish between the underlying perceptual process and its social consequences.”</p>
<p>The experiments also relied on visual images to induce sexual arousal. Real-world sexual arousal often involves multiple senses, so future studies might benefit from using audio or immersive scenarios to see if the effects are stronger. Additionally, the study relied on self-reported measures of sexual arousal. People are not always perfectly aware of their own physical responses, which means subjective ratings might include some bias.</p>
<p>When applying evolutionary concepts to human behavior, researchers caution against assuming that natural biological processes are inherently good. “It is important not to confuse what is with what ought to be,” Wisman explained. “Demonstrating that certain perceptual tendencies exist does not imply that they are desirable or acceptable. For example, even if aggression has innate components, it does not follow that aggression is therefore good. Questions about what is appropriate depend on social norms and cultural values, not simply on whether a tendency has underlying psychological or biological roots.”</p>
<p>Addressing temporary states of arousal may offer a new path for reducing sexual harm. Programs that teach emotional regulation and help individuals recognize how arousal shifts their attention might be more effective than trying to change deep-seated beliefs. Recognizing the role of physical states in shaping perception allows for more nuanced intervention strategies in the future.</p>
<p>“My broader goal is to further integrate sexual arousal into our understanding of human motivation and cognition,” Wisman said. “In particular, I am interested in how sexual motivation shapes everyday perception, judgment, and behavior, and how these state-driven processes interact with more stable individual differences.”</p>
<p>The researchers hope to continue building on these findings. “A broader aim of this research is to move toward a more integrated understanding of human mating behavior, in which stable traits and temporary motivational states are seen as jointly shaping behavior, rather than as competing explanations,” Wisman concluded.</p>
<p>The study, “<a href="https://doi.org/10.1080/00224499.2026.2658752" target="_blank">Objects of Desire: The Role of Sexual Arousal in the Sexual Objectification of Women by Men</a>,” was authored by Arnaud Wisman and Andrew G. Thomas.</p></p>
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<p><strong>Forwarded by:<br />
Michael Reeder LCPC<br />
Baltimore, MD</strong></p>
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