Effects of Mindfulness-Based Cognitive Therapy on Depression: A Preliminary Study

[Speaker] Koshikawa, Fusako:1
[Co-author] Soma, Hanae:1, Maekawa, Manami:1, Sakuma, Kenichi:2, Sakuma, Nobuko:2
1:Waseda University (Japan), 2:Sakuma Clinic (Japan)

This study examined the effects of mindfulness-based cognitive therapy (MBCT) on depression, decentering, and quality of life. The experimental group consisted of five persons with mild to moderate depression who participated in an 8-week MBCT program at a psychosomatic medicine clinic. A questionnaire including the CES-D, a decentering scale, and the QOL24 was administered before and after the program. The control group consisted of five undergraduate students whose CES-D scores were almost the same as those of the experimental group. They answered the same questionnaire but did not participate in any treatment program.
ANOVAs showed significant group by time interactions in favor of the experimental group on measures of depression (p=.004, η2=.320) and decentering (p=.001, η2=.292). Post-program between-group effect sizes (Hedges' g) were 2.779 and 5.013 respectively. This suggests that the MBCT program is effective at least for persons with mild to moderate depression.
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