- 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
- Earlier optimism
- Our Classification
- Factor Optimism - Pessimism, based on indirect agree/disagree questionnaire items, e.g. chances of success in life, most endeavors are worthwhile, life consists of a procession of disillu- sionments, the future looks black as pitch. Assessed two years earlier.