- Male college students, followed 3 years, Harvard University, USA, 1957-60
- N = 17
- Non Response:
- 37%: 9 dropouts, incomplete; about the same happiness distribution.
Mood diary kept 30 days and repeated interviews and tests during three years.
- Authors's label
- Variation in hedonic level, within day
- Our Classification
- Hedonic level of affect was rated each night during 6 weeks. The days highest, average and lowest mood was rated.
1. Day to day variation
Mean differences between the lowest
and highest mood reported each day
during 6 weeks.