- Gander, F.; Proyer, R.T.; Ruch, W.
- Positive Psychology interventions Addressing Pleasure, Engagement, Meaning, Positive Relationships, and Accomplishment Increase Well-Being and Ameliorate Depressive Symptoms: A Randomized, Placebo-Controlled Online Study.
- Frontiers in Psychology, 2016, Vol. 7, 1 - 13
- English (Australia, Canada, UK, USA)
Eligible for inclusion in findings archive
- No, no valid measure of happiness used.