- Female college students, Radcliff USA, followed 6 weeks, 1957
- N = 21
- Non Response:
Mood diary kept 30 days.
- Authors's label
- Our Classification
- Comparison of mean daily ratings on hedonic level with daily ratings prior to and during menstruation.
Observed Relation with Happiness
Eleven women also showed a lower 'average' hedonic level on the day the menstrual period commenced.