- 20-65 aged, general public, The Netherlands, 1968
- N = 1552
- Non Response:
- 34% refusal and unattainable.
- Authors's label
- Doubt about meaning-fulness of own exis-tence
- Our Classification
- Direct question rated on a graphic scale ranging from 'never' to 'very often'.
Observed Relation with Happiness
Stronger among lower education.
Unaffected by S.E.S.
Unaffected by sex.