Self-reported assertion and aggression among violent offenders with high or low levels of overcontrolled hostility

Self-report measures of personality, assertion, aggression and difficulty with social situations were completed by 66 male prisoners convicted for violent offences. Inmates were divided into overcontrolled and less-controlled groups on the basis of MMPI OH scores. No significant differences emerged on total ASES Assertion scale scores or on the four social-situation difficulty items dealing with assertiveness. However, overcontrolled men scored significantly lower on the Negative Assertion subscale and on the Aggression scale, as well as on two social-situation difficulty items dealing with the control of aggression. Less-controlled males showed a significant positive correlation between Aggression scale scores and negative assertion which was not obtained for the overcontrolled group. Results were discussed in terms of the different treatment needs of the two groups when using assertion or social-skills training with offender populations.