Multigroup confirmatory component and factor analyses of the Italian version of the Aggression Questionnaire

Multisample confirmatory factor analyses were carried out in samples of Italian university and high school students in order to assess the replicability of the factor structure in the Italian version of the Aggression Questionnaire by Buss and Perry. Item-level multiple-group component analysis confirmed Buss and Perry's 4-factor structure of the Aggression Questionnaire items in both samples. The results of multisample maximum likelihood confirmatory factor analysis of scale scores supported the hypothesis of single aggression latent dimension underlying the four Aggression Questionnaire scales, the structure of which was invariant across the two samples.