Study Costa et al. (1985): study US 1958
- Married males, followed ±12 years Baltimore, USA, 1958-1970
- N = 196
- Non Response
- Attrition T1-T3: 82%
Questionnaire: Paper & Pencil Interview (PAPI)
- Authors's Label
- Quantity and qualityof friendships
- Our Classification
- Obtained by factor analysis.
Factor consisting of 8 items.
Items with high loading:
" My many friends make my life happy and cheerful".
"I have more friends than I ever had before".
"How many friends do you have?"
Questions administered at T1.