Study Mussen et al. (1980): study US 1928
- Mothers, followed from age 30 to 70, Berkeley USA, 1928-68
- N = 53
- Non Response
Multiple assesment methods
Observation and interviews at age 30 and age 70
- Authors's Label
- Excitable; energetic; talkative;restless
- Our Classification
- Personality factor that appears in an analysis of ratings by two interviewers on 71 personality-social characteristics.
This factor appeared in young adulthood (T1: age 30) as well as in old age (T2: age 70). Correlation over this 40-year-period is +.24 .