Beck's cognitive therapy (CT) was compared to a no-treatment control in the
reduction of anger in college students. CT lowered trait anger anger react
ivity to many potential provocations, anger in the individual's most angeri
ng ongoing situation, daily anger anger-related physiological arousal, ange
r suppression, and outward negative expression. CT also enhanced positive f
orms of anger expression. Treatment effect sizes were medium to large, with
many being quite large, and significantly more CT participants met art ind
ex of clinically significant change. Moreover, CT lowered trait anxiety and
depression. Reductions of anger and trait anxiety were maintained at 15-mo
nth follow-up. CT was judged an effective, promising treatment for anger re
duction.