A Comparative Effectiveness of Acceptance and Commitment Therapy and Group Cognitive Therapy for Major Depressive Disorder

Background: acceptance and commitment therapy (act) is a new method of psychotherapy for major depressive disorder (mdd). the aim of this experimental study is evaluating the effectiveness of acceptance and commitment therapy and cognitive therapy.materials and methods: in this randomized clinical trial, 19 depressive out-patients were randomly divided into 2 groups (acceptance and commitment therapy and cognitive therapy). twelve therapeutic sessions administered in consulting center of tehran university twice a week. all the subjects were tested by beck depression inventory (bdi-ii)) and the ruminative response scale (rrs) before and after the treatments. data were analyzed by multivariate analysis of covariance (mancova).results: the results show no significant differences between the two groups in terms of the variables of depression and rumination.conclusion: overall, the results suggest that act is an effective treatment, the effectiveness of which appears equivalent to that of ct.