Does the Three Good Things Exercise Really Make People More Positive and Less Depressed? A study in Japan

Objective: Seligman, Steen, Park, and Peterson (2005) reported that people who wrote down three good things (TGT) for a week exhibited significantly greater happiness and less depression. An online study was conducted to examine whether performing a similar exercise reduces depressive symptoms and increases positive affect (PA) in the Japanese population. Methods: One thousand Japanese adults were randomly assigned to the TGT group or the control group. Participants in the TGT group were instructed to perform the TGT exercise at least twice a week for four weeks, whereas participants in the control group were told to record three past events. Results: An increase in PA was observed in the TGT group at the post-test, but not at the one-month follow-up. There were no significant changes in depressive symptoms at the post-test or the one-month follow up in either group. Participants in the TGT group exhibited a significant increase in general trust at both the post-test and the one-month follow-up. A significant increase in this variable at the one-month follow-up was also observed in control participants. Conclusion: Performing the TGT exercise increases PA, but this increase is temporary. The TGT exercise may be effective in enhancing general trust.