- 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
- Personal maturity and integration
- Our Classification
- Composite clinical rank order ranging from 'most neurotic, regressed, disin- tegrated' to 'most secure, mature, in- tegrated'.