Study Bortner & Hultsch (1970): study US 1959

Public

21+ aged, general public, USA, 1959

Sample

Respondents

N = 1301

Non Response

9%

Assessment

Interview: face-to-face
Structured interview

Correlate

Authors's Label

Age

Our Classification

Operationalization

20-29 / 30-39 / 40-49 / 50-59 / 60-69 / 70+

Observed Relation with Happiness