EXPLORATION INTO THE SOURCES OF INDIVIDUAL-DIFFERENCES IN AGGRESSION-RELATED, HOSTILITY-RELATED AND ANGER-RELATED (AHA) PERSONALITY-TRAITS

In this study a behavior-genetic approach was used to identify sources of individual differences in Aggression-, Hostility- and Anger-relate d (AHA) personality traits (as measured with Spielberger's anger scale s and scales from the Karolinska Scales of Personality), based on a sa mple (N = 140 individuals) that comprised of monozygotic twin pairs re ared together (N-pairs = 26) or reared apart (N-pairs = 15), and dizyg otic twin pairs reared together (N-pairs = 29). In general, the result s account for sibling similarity in hostility, whereas genetic factors account for sibling similarity in angry aggression and irritability ( trait anger). Copyright (C) 1996 Elsevier Science Ltd.