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Heritability of the big five personality dimensions and their facets: a twin study.
The genetic and environmental etiology of the five-factor model of personality as measured by the revised NEO Personality Inventory (NEO-PI-R) was assessed using 123 pairs of identical twins and 127…
Genetic and environmental influences on trauma exposure and posttraumatic stress disorder symptoms: a twin study.
- M. Stein, K. Jang, Steven Taylor, P. Vernon, W. Livesley
- Psychology, MedicineThe American journal of psychiatry
- 1 October 2002
Consistent with symptoms in combat veterans, PTSD symptoms after noncombat trauma are also moderately heritable, and many of the same genes that influence exposure to assaultive trauma appear to influence susceptibility to PTSD symptoms in their wake.
Phenotypic and genetic structure of traits delineating personality disorder.
The results support the following conclusions: first, the stable structure of traits across clinical and nonclinical samples is consistent with dimensional representations of personality disorders, and second, the higher-order traits of personality disorder strongly resemble dimensions of normal personality.
A behavioral genetic investigation of the Dark Triad and the Big 5
This study reports the first behavioral genetic investigation of the three Dark Triad variables (narcissism, Machiavellianism, and psychopathy) and their relationships with the Big 5 personality…
Intelligence and speed of information-processing: A review of 50 years of research
A behavioural genetic study of mental toughness and personality
The present study is the first behavioural genetic (BG) investigation of mental toughness, as measured by the 48-item mental toughness (MT48) questionnaire, and the first BG investigation of…
Relationships between factors of intelligence and brain volume
The recent explosion of studies aimed at determining the biological basis of intelligence has revealed that cognitive ability has a strong biological substrate. This study expands on this literature…
Speed of Information-Processing and Intelligence:
- P. Vernon
Follow up what we will offer in this article about speed of information processing and intelligence . You know really that this book is coming as the best seller book today. So, when you are really a…
Trait Emotional Intelligence and the Dark Triad Traits of Personality
- K. Petrides, P. Vernon, J. A. Schermer, L. Veselka
- Psychology, MedicineTwin Research and Human Genetics
- 1 February 2011
This study presents the first behavioral genetic investigation of the relationships between trait emotional intelligence (trait EI or trait emotional self-efficacy) and the Dark Triad traits of…