Temperament traits and mental illness have been linked to varying degrees of imbalances in neurotransmitter systems of behavior regulation. If a temperament model has been carefully structured to reflect weak imbalances within systems of behavior regulation, then in the presence of mental illness, these profiles should exhibit distinct patterns consistent with symptoms of mental illness. In con...

Growing effort is being made to understand how different attractive physical traits co-vary within individuals, partly because this might indicate an underlying index of genetic quality. In humans, attention has focused on potential markers of quality such as facial attractiveness, axillary odor quality, the second-to-fourth digit (2D:4D) ratio and body mass index (BMI). Here we extend this app...

Relations between the Big 5 personality traits and aggressive behavior have been studied frequently. However, no work has tested whether that relation is direct or indirect through aggressive attitudes and aggressive emotions. Data from two large samples that used different Big 5 measures examined these effects. Overall, results showed that the paths from Big 5 traits to aggressive behavior dep...

OBJECTIVES To examine appetite traits, level of physical activity, and television (TV) time as predictors of change in Body Mass Index Standard Deviation Score (BMI SDS) from age 6 to 8 and to explore the effect of BMI SDS (from age 4) on appetite traits. METHODS In all, 995 Norwegian children participated at age 4; 760 and 687 of these children took part in the assessment at ages 6 and 8, re...

The Five Factor Model, one of the most commonly used models for assessing personality, consists of five main universal traits: extraversion, neuroticism, agreeableness, conscientiousness, and openness to experience (McCrae & John, 1992). Recently, its application to fields investigating the role of personality on physical and mental health has been extensive, with most traits producing consiste...

Two studies compared the development of beliefs about the stability and origins of physical and psychological traits in Japan and the United States in three age groups: 5-6-year-olds, 8-10-year-olds, and college students. The youngest children in both cultures were the most optimistic about negative traits changing in a positive direction over development and being maintained over the aging per...

to study general and specific combining ability of some rice varieties for grain physical properties and milling quality, a diallel design with five parents (hashemi, vandana, kadous, shahpasand and ir36) was used. parents and their f1 progenies (25 genotypes) were grown in a randomized complete blocks design with three replications in the research field of rice research institute of iran (rrii...

A number of authors have provided a useful evolutionary perspective on personality disorders, arguing that personality traits can be conceptualized in terms of evolutionary strategies. If we consider personality traits not as illnesses but as stable evolutionary strategies, the characteristic features of borderline personality disorder may respond to a behavioral pattern which, although deviati...

BACKGROUND Twin and family studies that estimated the heritability of daily physical activity have been limited by poor measurement quality and a small sample size. OBJECTIVE We examined the heritability of daily physical activity and sedentary behavior assessed objectively by using combined heart rate and movement sensing in a large twin study. DESIGN Physical activity traits were assessed...