- Undergraduate students, US, 199?
- N = 222
- Non Response:
Daily report of mood and activities during 51 days; peer ratings.
- Authors's label
- Our Classification
- Extraversion subscale of Neo Personality Inventory (Costa & Macrae, 1985)
- Activity Level
Observed Relation with Happiness
a 10% least happy 104.9
b 27% close to average 120.4
c 10% most happy 132.9