- Proyer, R.T.; Gander, F.; Wellenzohn, S.
- Nine Beautiful Things: A Self-Administered Online Positive Psychology Intervention on The Beauty in Nature, Arts, and Behaviors Increases Happiness and Ameliorates Depressive Symptoms
- Personality and Individual Differences, 2016, Vol. 94, 189 - 193
- English (Australia, Canada, UK, USA)
Eligible for inclusion in findings archive
- No, no valid measure of happiness used.