- 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
- College performance
- Our Classification
- Student's yearly grade average.
Observed Relation with Happiness
Sophomore year : r = +.53 (05)
Junior year : r = +.15 (ns)
Senior year : r = +.31 (ns)