Mean anger index (N = 1,110)
Whites are significantly less angry than blacks at the 95% confidence level. The difference between the two means is 25% of one standard deviation.
A study of twins calculated heritabilities for the angry-hostility sub-scale of the NEO: .52 for Canadians, .52 for Germans, and .40 for Japanese (Jang et al. 2001. Covariance structure of neuroticism and agreeableness. Journal of Personality and Social Psychology, 81, 295-304.)
Variables: ANGRY, HOWANGRY, ANGRLAST