- Male college students, followed 3 years, Harvard University, USA, 1957-60
- N = 17
- Non Response
- 37%: 9 dropouts, incomplete; about the same happiness distribution.
Multiple assesment methods
Mood diary kept 30 days and repeated interviews and tests during three years.
- Authors's Label
- Avowed happiness
- Our Classification
- Questionnaire items indicative of avowed happiness - unhappiness.
Assessed two years earlier.
Observed Relation with Happiness
Mean daily highest mood : r = +.66
Mean daily average mood : r = +.67
Mean daily lowest mood : r = +.32