Study Costa & McCrae (1980): study US 1976

Public

35-85 aged white males (largely veterans), USA, 1976

Sample

Respondents

N = 1100

Non Response

T1:21%; T2:18%; T3:27%; T4:46%

Assessment

Questionnaire: Paper & Pencil Interview (PAPI)
Mailed questionnaire att intervals of 3 months

Correlate

Authors's Label

Sociability

Our Classification

Operationalization

5-item index from the EAST-III Tempera-
ment Survey (Buss & Plomin, 1975:241-242)
1. I make friends very quickly
2. I am very sociable
3. I tend to be shy (reverse)
4. I usually prefer to do things alone   (reverse)
5. I have many friends

Observed Relation with Happiness