- 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
- Life history
- Our Classification
- 212-item inventory of past life expe- riences.
18 scores were derived, indicating good or bad past experiences in various life areas. Only a few scores were related to hedonic level. Other scores were not presented.