PSYC 337 Chapter Notes -Oversampling, Genetic Correlation, National Comorbidity Survey
8 Dec 2013
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Document Summary
Posttraumatic stress disorder (ptsd): a psychiatric disorder, involving exposure to a precipitating event. Phenotype: the visible characteristics of an organism resulting from the interaction between its genetic makeup and the environment. Expand the understanding of relative contributions of genetic and environmental factors to trauma exposure, ptsd, and mdd. Measure the heritable influences on four different phenotypes (low and high-risk trauma, ptsd and mdd) in order to estimate the degree of commonality between the genetic and environmental bases of variance amongst them. Childhood trauma study volunteer twin panel, their siblings and parents from a large australian national health and medical. 1532 adult twins & 1059 siblings from a large population sample of male and female twin pairs. Of the twins 899 high-risk families, and the remaining 633 control families. Criteria: they had experienced childhood sexual and physical abuse. 524 high-risk families experienced childhood sexual or physical trauma (variant) 373 control families experienced no trauma.
