Study McCrae & Costa (1991): study US Baltimore County, Maryland 1979
- Single males and couples Baltimore USA, followed 7 years, 1979-86
- N = 429
- Non Response
- Questionnaire: Paper & Pencil Interview (PAPI)
- Authors's Label
- Positive affect
- Our Classification
- 5-item index of closed questions on specific affects, part of Bradburn Affect Balance Score (AFF 2.3).
Assessed at T1(1979) and T2(1981).