The Aggression Questionnaire (Buss & Perry, 1992) has been used to investigate links between personality factors and health outcomes. We developed the Japanese version of the Buss-Perry Aggression Questionnaire (BAQ) and assessed validity and reliability of the scale. Study 1 (N = 1 125 college students) used a 45-item rating questionnaire measuring each of four components of aggression: Anger, Hostility, Physical Aggression, and Verbal Aggression. Four aggression subscales emerged clearly from exploratory factor analysis. Study II (N = 611 college students) used a 24-item questionnaire and replicated factor structure and factor loadings of Study I. The scales were shown to be highly internally consistent, and stable at appropriate levels over 4-month time period. Normative data, factorial validity, and external evidence of construct, convergent, and discriminant validity for the scales were also presented.
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