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Correlational findings

Study Kohler et al. (2005): study DK 2002

Public
20-70 aged identical twins, Denmark, 2002
Sample
Respondents
N = 3226
Non Response
26%
Assessment
Questionnaire: Paper & Pencil Interview (PAPI)

Correlate

Authors's Label
Number of stepchildren
Our Classification
Operationalization

Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks O-SLu-u-sq-v-4-g = WITHIN MONOZYGOTIC TWIN-PAIR DIFFERENCE IN HAPPINESS O-SLu-u-sq-v-4-g Beta = - s Beta’s controlled for:
- at least one child
- number of additional children
- currently in partnership
- remaining with the same partner as for the first child

- females aged 25-45 years: Beta = -.06 (ns)
- males aged 50-70 years: Beta = -.11 (05) O-SLu-u-sq-v-4-g = BETWEEN ALL SUBJECTS DIFFERENCE IN HAPPINESS O-SLu-u-sq-v-4-g = Regressions across all subjects yield similar results