- 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
- Thought processes
- Our Classification
- Wessman & Ricks Thought Processes Scale, scored each night for lowest, average and highest mood experienced that day during one month.
Observed Relation with Happiness
Daily highest : r = +.72 (05)
Daily average : r = +.74 (05)
Daily lowest : r = +.36 (ns)