A treatment-evaluation of Acceptance and Commitment Therapy for an adult with chronic depression: Toward bridging between traditional case reports and randomized controlled trails.

The purpose of the present article was to argue the importance of evidence other than randomized controlled trails, or treatment evaluation. Moreover, it was to describe the effectiveness of Acceptance and Commitment Therapy (ACT), which is one of the "third-wave" of cognitive and behavioral therapies, for an adult with chronic depression. In this treatment evaluation, a 48-years-old male participated in nine sessions of ACT treatment after three assessment and case-formulation sessions. After that, he participated in two buster sessions. As a result, his symptom of depression was “reformed”, his valued-actions were increased, and he came back to his former office. Furthermore, he was continuing to work in his office during five months, with three follow-up sessions. These results suggest ACT treatment might have been effective for chronic depression.