- 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
- Past parental treat-ment and relation- ships
- Our Classification
- Scores derived from a 212-item invento- ry of past life experiences.