- Couples, USA, followed 12 years, 1980-1992
- N = 1150
- Non Response:
- Interview: telephone (CATI)
- Authors's label
- Our Classification
- A six-item, Likert-type scale ranged 1= non to 5= a great deal.(Rogenburg et al. 1995)
It addresses aspects such as whether respondents feel that they have good qualities, feel useless at times, are satisfied with themselves, or feel that they are failures.