Dimensions over categories: a meta-analysis of taxometric research.

We report the first meta-analysis of taxometric research, examining 317 findings drawn from 183 articles that employed an index of the comparative fit of observed data to dimensional and taxonic data simulations. Findings supporting dimensional models outnumbered those supporting taxonic models five to one. There were systematic differences among 17 construct domains in support for the two models, but psychopathology was no more likely to generate taxonic findings than normal variation (i.e. individual differences in personality, response styles, gender, and sexuality). No content domain showed aggregate support for the taxonic model. Six variables - alcohol use disorder, intermittent explosive disorder, problem gambling, autism, suicide risk, and pedophilia - emerged as the most plausible taxon candidates based on a preponderance of independently replicated findings. We also compared the 317 meta-analyzed findings to 185 additional taxometric findings from 96 articles that did not employ the comparative fit index. Studies that used the index were 4.88 times more likely to generate dimensional findings than those that did not after controlling for construct domain, implying that many taxonic findings obtained before the popularization of simulation-based techniques are spurious. The meta-analytic findings support the conclusion that the great majority of psychological differences between people are latently continuous, and that psychopathology is no exception. PMID: 3249...
Source: Psychological Medicine - Category: Psychiatry Authors: Tags: Psychol Med Source Type: research

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 When was the last time you simply enjoyed being in nature? Whether it’s a camping trip to the mountains, a walk in the park or just watching the squirrels from your backyard, being in nature is profoundly healing. In today’s Psych Central Podcast, our guest Richard Louv, a journalist, author and co-founder of the nonprofit Children &Nature Network, discusses the science behind nature’s healing powers. What counts as “nature?” Are pets included? What are some modern barriers to accessing nature, and how can we overcome them? Join us for the answers to these questions and more. SUBSCRIB...
Source: World of Psychology - Category: Psychiatry & Psychology Authors: Tags: Anxiety and Panic General Green and Environment Interview LifeHelper Mental Health and Wellness Podcast Stress The Psych Central Show Source Type: blogs
The ability of resting-state functional MRI (fMRI) to pinpoint reduced brain...Read more on AuntMinnie.comRelated Reading: fMRI connects words to brain activity fMRI may speed up diagnosis of autism fMRI links imaging biomarker to PTSD treatment response PET, fMRI shed light on alcohol's effects on brain Machine learning, fMRI unlock cellular brain properties
Source: AuntMinnie.com Headlines - Category: Radiology Source Type: news
CASE: Alex is a 14-year-old Portuguese-American boy with a psychiatric history starting at age 5 who presents to your primary care practice after an insurance change. He was delivered prematurely at 32 weeks and diagnosed with congenital hypothyroidism at the age of 6 weeks and growth hormone deficiency at the age of 2 years; he is in active treatment for both. He otherwise met developmental milestones on time yet continues to have significant fatigue despite adequate sleep and vitamin D supplementation. His family history is remarkable for maternal anxiety, depression, suicidal thoughts, and previous attempted suicide...
Source: Journal of Developmental and Behavioral Pediatrics - Category: Child Development Tags: Challenging Case Source Type: research
Conclusion: There may be an association between schizophrenia and HNPP. In observational studies, the deletion of interest (chromosome 17p12) was nearly 10 times more common in schizophreniform patients than in controls. This potential association could be pathophysiologically explained by the role of PMP22, which is mainly expressed in the peripheral nervous system. However, PMP22 mRNA and protein can also be found in the brain. PMP22 seems to play an important role in regulating cell growth and myelination, functions that are disturbed in schizophrenia. Such a connection obviously cannot be clarified on the basis of one ...
Source: Frontiers in Psychiatry - Category: Psychiatry Source Type: research
Discussion “[Cannabis] is a genus of flowering plant with three main varieties: sativa, indica and ruderalis.” It has been used for hundreds of years for hemp or fiber and also for psychoactive and medicinal effects. The active compounds are collectively called cannabinoids, of which delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) are the most abundant. The floral buds or calyxes of the plant have the most cannabinoids, but other parts of the plant are also used such as leaves. Hash oil, hashish (or resin) and marijuana (dried leaves) are the common products from strongest to least strongest products. ...
Source: PediatricEducation.org - Category: Pediatrics Authors: Tags: Uncategorized Source Type: news
The men file in, a few wearing pressed button-down shirts, others jeans caked in mud from work on a construction site. They meet in the living room of an old taupe bungalow on a leafy street in a small Southern city. Someone has shoved a workout bike into the corner to make room for a circle of overstuffed chairs dug up at the local Goodwill. The men jockey for a coveted recliner and settle in. They are complaining about co-workers and debating the relative merits of various trucks when a faint beeping interrupts the conversation. One man picks up a throw pillow and tries to muffle the sound of the battery running low on h...
Source: TIME: Health - Category: Consumer Health News Authors: Tags: Uncategorized nation sex offender therapy Source Type: news
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Source: NHS News Feed - Category: Consumer Health News Tags: Mental health Source Type: news
People have said this to me many times over the years. Here’s another Wheat Belly Basics conversation for newcomers or a refresher for the seasoned Wheat Belly follower. One of the reason that wheat and related grains are such effective causes of weight gain is that they contain a protein, gliadin, that, upon digestion, yields opioid peptides that bind to the opiate receptors of the human brain. These opioid peptides are responsible for generating addictive relationships with food, as well as behavioral and emotional effects. Stop eating grains and an opiate withdrawal syndrome ensues: nausea, headache, fatigue, depr...
Source: Wheat Belly Blog - Category: Cardiology Authors: Tags: Wheat Belly Lifestyle addiction appetite stimulant binge eating bulimia Detox eating disorders gluten gluten-free grain-free grains health opiates opioids Weight Loss wellness withdrawal Source Type: blogs
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Source: Journal of Developmental and Behavioral Pediatrics - Category: Child Development Tags: Challenging Case Source Type: research
During my twenty-five years as president and CEO of the Jewish Healthcare Foundation (JHF), I have learned how to help people navigate the health care system. But I have struck out miserably when it comes to helping people facing behavioral health issues. I’ve had the pleasure of watching many talented staff members start and raise families of their own. One employee of the foundation, located in Pittsburgh, Pennsylvania—let’s call her Amy—is a doting single parent to Joe, a towering teenager with a wry sense of humor and dyed, technicolor hair. Images of Joe—from football games, camping trips...
Source: Health Affairs Blog - Category: Health Management Authors: Tags: Featured GrantWatch Quality Access adolescents Behavioral Health behavioral service needs Effectiveness Health Philanthropy Health Promotion and Disease PreventionGW Mental Health Source Type: blogs
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