Deliberate self-harm in a nonclinical population: prevalence and psychological correlates.
- E. D. Klonsky, T. Oltmanns, E. Turkheimer
- Psychology, MedicineAmerican Journal of Psychiatry
- 1 August 2003
Self-harmers had more symptoms of several personality disorders than non-self- Harmers, and their performance across measures suggested that anxiety plays a prominent role in their psychopathology.
Intelligence: new findings and theoretical developments.
The relationship between working memory and intelligence, the apparent contradiction between strong heritability effects on IQ, whether a general intelligence factor could arise from initially largely independent cognitive skills, the relation between self-regulation and Cognitive skills, and the effects of stress on intelligence are reported.
Socioeconomic Status Modifies Heritability of IQ in Young Children
- E. Turkheimer, A. Haley, M. Waldron, B. D’Onofrio, I. Gottesman
- PsychologyPsychology Science
- 1 November 2003
Results demonstrate that the proportions of IQ variance attributable to genes and environment vary nonlinearly with SES, and suggest that in impoverished families, 60% of the variance in IQ is accounted for by the shared environment, and the contribution of genes is close to zero; in affluent families, the result is almost exactly the reverse.
Three Laws of Behavior Genetics and What They Mean
- E. Turkheimer
- 1 October 2000
Twin studies offer a useful methodological shortcut, but do not show that genes are more fundamental than environments, andotype is in fact a more systematic source of variability than environment.
The Schedule for Nonadaptive and Adaptive Personality (Snap)
Investigating the test-retest reliability and predictive validity of the diagnostic scales from the Schedule for Nonadaptive and Adaptive Personality (SNAP) found scores on diagnostic scales for paranoid, schizoid, and schizotypal PD were inversely related to self-reported levels of adjustment for social roles concerned with work as a student, leisure activities, and relation-ships with family.
Nonshared environment: a theoretical, methodological, and quantitative review.
The authors review the conceptual foundations of nonshared environment, with emphasis on distinctions between components of environmental variance and causal properties of environmental events and between the effective and objective aspects of the environment.
Detrimental Psychological Outcomes Associated with Early Pubertal Timing in Adolescent Girls.
Genotype by Environment Interaction in Adolescents’ Cognitive Aptitude
Results suggest that environmental differences between middle- to upper-class families influence the expression of genetic potential for intelligence, as has been suggested by Bronfenbrenner and Ceci's (1994, Nature-nurture reconceptualized in developmental perspective: a bioecological model).
Perceptions of people with personality disorders based on thin slices of behavior
Gene-Environment Correlation and Interaction in Peer Effects on Adolescent Alcohol and Tobacco Use
The interplay between genetic liability and peer influences on the development of adolescent alcohol and tobacco use was examined using a nationally-representative sample of adolescent sibling pairs and their best friends.