New research suggests that sadistic tendencies are a distinct aspect of personality, joining psychopathy, narcissism, and Machiavellianism to form a 'Dark Tetrad'. Studies reveal that individuals with high levels of sadism experience pleasure from causing or observing others' suffering.
A University of Colorado Cancer Center study found that current ALK-positive lung cancer criteria may miss patients who could benefit from crizotinib. The researchers suggest that doctors should re-evaluate borderline or atypical cases, potentially expanding treatment eligibility.
A University of Pittsburgh study reveals that the interaction between two species' personalities is key to predicting ecological outcomes. Researchers observed varying activity levels among jumping spiders and house crickets, finding that combined personality types best predicted survival for crickets and foraging success for spiders.
Researchers found that neurotic men born after 1957 have fewer children, while extraverted men and conscientious women tend to have more. The study suggests personality effects may be contributing to the decline of fertility rates in Europe.
A study led by Dr. Elizabeth Osuch found a correlation between the activation of the putamen region in the brain and bipolar disorder symptoms. The discovery may lead to a definitive biological marker for differentiating between major depressive disorder and bipolar disorder, ultimately improving diagnosis and treatment.
A recent study examined post-traumatic stress disorder (PTSD) in a group of 1,040 rescue workers who participated in the Wenchuan earthquake relief. The findings indicate that PTSD was diagnosed in 64% of the participants, primarily due to factors such as near-death experience, severe injury or mental trauma, and low social support.
A longitudinal study found that children with lower conscientiousness tend to experience worse health, including greater obesity, as adults. Childhood conscientiousness was significantly associated with decreased cardiovascular and metabolic system function, leading to increased risk of cardiovascular disease.
Researchers found that keeping a secret can change the way people interact with others, leading to more deceptive behavior among friends and superficial positivity towards acquaintances. Additionally, high neuroticism and low conscientiousness are consistently associated with increased risk of obesity across various samples. Confrontin...
A study of 184 participants suggests that individuals with a higher level of sensation-seeking tend to prefer spicy foods. Those who score above the mean on the Arnett Inventory of Sensation Seeking liked spicy meals consistently as the burn increased, while those below the mean rapidly disliked them.
Research at University of Southampton reveals that youthful extroversion and emotional stability significantly influence happiness and well-being in later adulthood. Neuroticism, on the other hand, is linked to poorer mental health outcomes.
A study of over 6,500 children found that early childhood temperament styles can predict alcohol use and problems in mid-adolescence. Temperaments such as emotional and behavioral difficulties were linked to an increased risk of drinking, while sociability was also a significant factor.
A study of 191 patients found that ADHD-related impulsivity worsens the prognosis for adults with eating disorders, particularly those with bulimia and binge-eating disorders. The research also identified age and low self-direction as risk factors for developing an eating disorder.
A study published in PLOS ONE found that long-lived female house mice are less active than shorter-lived counterparts, consuming less food and displaying reactive personality traits. The researchers suggest that life-history theory predicts individuals with greater life expectancy to be more cautious and energy-conserving.
German students who study abroad exhibit increased openness, conscientiousness, and extraversion compared to their peers. A year-long online study revealed that international experiences foster personal growth, including improved emotional stability.
A study published in CMAJ found that 13.5% of Canadian Forces personnel who served in support of the Afghanistan mission between 2001-08 had a mental health disorder related to their deployment. The most common disorders were posttraumatic stress disorder (PTSD) and depression, with PTSD being found in 8% of personnel.
A personality test conducted on grey mouse lemurs found distinct personalities among the animals, with some exhibiting shy behavior and others being bold. The study aims to improve breeding programs and reintroduction efforts for these endangered primates.
A study funded by the National Institute of Aging investigates the link between personality traits and telomere length, a measure of cellular aging. The research examines whether personality traits influence telomere length through healthy lifestyle and traumatic life events.
A pioneering study demonstrates the benefit of MRI in identifying mental illnesses such as bipolar disorder. The advanced imaging technique was able to correctly distinguish patients from healthy individuals with a high degree of accuracy, promising a new approach to diagnosis.
Researchers found that foster parents have a greater influence on the personalities of fostered offspring than genes inherited from birth parents. In zebra finches, personality traits can be transmitted through behaviour rather than just genetics. This study raises questions about the inheritance of personality in other species.
A new personality rating scale for chimpanzees has been developed to address limitations of previous scales. The scale includes 41 behavioral descriptors and was used to assess 99 chimpanzees, showing the personality ratings were associated with differences in behavior.
Researchers found that entrepreneurial personality structure is more prevalent in Western US states, Germany's Berlin-Hamburg axis, and Great Britain's East of England region. This correlation suggests a link between regional personality traits and entrepreneurial activity.
A new study published in Journal of Psychiatric Practice reports a hybrid categorical-dimensional diagnostic model proposed for DSM-5 aligns well with the current approach to personality disorder diagnoses. The findings support the adoption of this alternative model, which combines core dimensions of personality disorder with various m...
The Lancet Series on bipolar disorder offers a comprehensive overview of the condition, including its genetic basis, diagnostic challenges, and treatment limitations. The series highlights the need for more accurate diagnosis and personalized treatments, with neuroimaging research potentially transforming bipolar diagnosis.
A new study published in Psychological Science found that people who gain weight are more likely to exhibit impulsive behavior but also report increased deliberation. This surprising finding suggests an intimate relationship between a person's physiology and psychology.
New research from the University of Exeter suggests that small fish with aggressive personalities are more likely to win food contests against larger, passive counterparts. The study found that consistently aggressive fish were able to put on weight and survive in resource-scarce environments.
A study by W. Curt LaFrance Jr., M.D., M.P.H. found that TBI significantly increases the odds of major depression, personality impulsivity, and PTSD in patients with psychogenic nonepileptic seizures (PNES). Patients with PNES and TBI had higher rates of disability, unemployment, and poorer functioning.
Researchers found that patient age influences the onset of pathological gambling disorder and its clinical course. Younger patients are more likely to be impulsive, while older patients seek to modulate negative emotional states.
A Mayo Clinic study found that men with dementia with Lewy bodies are five times more likely to have rapid eye movement (REM) sleep behavior disorder, which can appear decades before a diagnosis. The study suggests that screening for this sleep disorder could improve diagnosis and treatment of dementia with Lewy bodies.
A meta-analysis of 51 studies found a positive correlation between conscientiousness and college grade point averages. The study suggests that individuals with higher levels of conscientiousness tend to excel academically beyond their initial high school grades or achievement test scores.
A new somatic symptom disorder in DSM-5 risks mislabeling many people as mentally ill due to a lack of specificity and high false-positive rate. The condition will classify excessive responses to distressing symptoms, potentially leading to inappropriate medical decision-making.
Research published in Occupational and Environmental Medicine found that night shift workers have a higher risk of developing ovarian cancer. Women who identified as 'owls' had a lower risk compared to those who were 'larks'. The study, based on data from over 1,100 women, suggests that melatonin may play a role in the increased risk.
A study found that family-focused treatment improved mood symptoms in children and adolescents at risk for bipolar disorder, with significant benefits for those from high expressed emotion families. The treatment showed promise in stabilizing symptoms and improving long-term outcomes.
Researchers at Cornell University found that brain activity patterns in the medial prefrontal cortex can accurately identify an individual's thought process about a person. This unique ability allows us to anticipate behavior and navigate social interactions with greater ease.
A Swedish-US study found that people with any mental disorder are five times more likely to be homicide victims than those without. The risk is highest among those with substance use disorders, but also affects individuals with depression, anxiety disorders, and personality disorders.
A new study reveals that children who experience childhood bullying are at a higher risk of developing psychiatric disorders in adulthood, including agoraphobia, anxiety, depression, and antisocial personality disorder. Researchers also found that bullies and victims alike face increased risks of suicidal tendencies.
A new University of Otago study followed over 1000 children and found that excessive TV viewing in childhood is associated with increased risks of antisocial behavior, including criminal conviction and aggressive personality traits, in adulthood. The study suggests reducing TV viewing could help reduce rates of antisocial behavior.
Researchers found that teaching high-risk adolescents how to manage their personality traits can reduce problem drinking and postpone its onset. This approach also reduces the influence of peer pressure within their social networks, creating group immunity among low-risk youth.
A new study published in JAMA Psychiatry found that targeted psychological interventions significantly reduced drinking behavior among high-risk teenagers. The 'Adventure Trial' intervention showed a 29% reduced risk of problem drinking and delayed risky drinking behavior over two years.
A recent study found that extraversion predicts neural activity in the brain's reward evaluation region, which may influence decision-making. Additionally, research suggests that personality traits such as conscientiousness are linked to better health outcomes, including lower obesity and higher life expectancy.
Research found that individuals with low risk of cocaine dependence have an abnormally large frontal lobe, associated with self-control. This region is smaller in those who develop addiction. The study suggests that certain personality traits and brain structure can predict addiction risk.
Researchers at University of Toronto Scarborough identified overactive negative emotion processing and underactive emotional regulation in people with Borderline Personality Disorder (BPD). This study provides valuable evidence for improving BPD diagnosis and treatment through brain imaging.
Research finds heightened activity in brain circuits for negative emotions and reduced activation of emotion-suppressing circuits in borderline personality disorder, with reduced frontal brain activity unique to the condition. The study suggests improved emotion regulation skills may be normalized after successful treatment.
A new study by Dr. Ilene Siegler and colleagues found that having a partner during middle age is protective against premature death. Married individuals had a significantly lower risk of dying early compared to those who never married or lost their partner, even after controlling for personality and health behaviors.
Researchers found that Tsimane indigenous population in Bolivia does not exhibit the traditional Big Five personality traits, but rather a 'Big Two' of prosociality and industriousness. The study's findings suggest that lifestyle and ecology shape human psychology more broadly.
A study of an isolated Bolivian society found that five widely accepted personality traits may not be universal, instead revealing a unique 'Big Two' structure including prosociality and industriousness. Researchers suggest expanding beyond Western populations to better understand personality development.
Patients with depressive disorders and borderline personality disorder have significantly higher unemployment rates than those without the condition. Persistent unemployment poses a significant public health burden, with 13.4% of patients missing up to two years or more from work.
A study by UK researchers found that attending physicians tend to rate borderline performances lower when previously exposed to good, rather than poor, performances. This contrast bias may result in biased judgments in competency-based education assessment systems.
Researchers found that the order of symptoms matters more for clinicians' descriptions of disorders that are different than those that overlap. This contradicts the assumption that order doesn't matter in psychiatric diagnoses. The study's findings have implications for bringing classification and clinical practice closer together.
A new model developed by Concordia researcher Mohammed Othman takes into account workers' personality strengths and differences to create a more efficient workforce planning system. The result is a significant cost savings of 7.1% compared to traditional approaches.
Researchers found that about one-quarter of placebo response was explained by personality traits such as resiliency, straightforwardness, altruism or anger/hostility. The study involved nearly 50 healthy volunteers and used brain scans to measure natural painkiller chemicals in the brain.
Researchers found that outside observers, including personal acquaintances and co-workers, can provide equally fair evaluations of employees' personalities as those who know them in a work context. This challenge traditional practices of using self-rated personality tests, which may lead to biased perceptions.
A new study by Professor Grant Brown and colleagues reveals that a fish's personality affects its ability to recall predator threats. Shy trout retain information about predator odors for up to eight days, while bold trout forget within 24 hours.
A large genetic replication study found compelling evidence that the chromosome 3p21.1 locus contains a common genetic risk for bipolar disorder, specifically the PBRM1 gene. This replication distinguishes the heritable risk for bipolar disorder and schizophrenia, contrasting with previous studies.
Researchers have identified genetic variations in genes associated with bipolar disorder I and II, providing new insights into the complex biochemical pathway involved. The study found associations between variants in PDE10A, DISC1, and GNAS genes and an increased risk of developing the mental illness.
A recent study found that two-thirds of the variation in avoidant and dependent personality disorder traits can be explained by genes, highlighting the importance of genetic influences in their development. The study's use of both questionnaire and interview measures provided a more comprehensive understanding of heritability.
An analysis of 42 US presidents suggests that fearless dominance, a trait associated with psychopathy, may be an important predictor of presidential performance. This study found correlations between boldness and higher ratings for leadership, persuasiveness, crisis management, and Congressional relations.
Research shows that nearly 20% of young children with cancer develop posttraumatic stress disorder, exhibiting symptoms such as flashbacks and anxiety. The study highlights the need for child-friendly treatment procedures and psychological support to prevent prolonged disorders that impair development.
Research from the University of Cambridge suggests that a traumatic upbringing during childhood is linked to impulsive and compulsive personality traits, increasing the risk of drug dependence. The study examined 50 adults with cocaine dependence and their biological siblings, finding a direct relationship between traumatic childhoods ...
A new study suggests pregnancy could have a positive impact on bipolar disorder, with fewer and shorter episodes in pregnant women. The study's findings call for large, multicenter, prospective studies to better understand the natural course of the disorder.
A new study by Dr. Inti Pedroso and colleagues has identified key genes and neural signaling pathways involved in the development of bipolar disorder. The findings, published in Biological Psychiatry, provide insight into the complex biology of the disorder and highlight potential new avenues for treatment.