- Freese, J.; Irwin, W.; Meland, S.
- Expressions of Positive Emotion in Photographs, Personality, and Later-Life Marital and Health Outcomes.
- Journal of Research in Personality, 2007, Vol. 41, 488 - 497
- 0092 6566
- English (Australia, Canada, UK, USA)
Eligible for inclusion in findings archive
- No, no valid measure of happiness used.