Study Loehlin & Nichols (1976): study US 1963
- Public:
- Adolescent same-sex twins, USA, 1963
- Sample:
- Respondents:
- N = 850
- Non Response:
- 29 %
- Assessment:
-
Questionnaire: paper
Supplementary information from parents on mailed questionnaire
Correlate
- Authors's label
- Sex
- Our Classification
-
-
- Operationalization
- A Males
Identical twins
Fraternal twins
B Females
Identical twins
Fraternal twins
Observed Relation with Happiness
Male twin M = 6,11 M = 6,03 M = 6,08
Female twin M = 6,28 M = 6,12 M = 6.22
Male twin 65% 69% 67%
Female twin 77% 76% 77%
Gender difference among fraternal twins ns
Male twin 83% 75% 80%
Female twin 77% 81% 79%
Significance tests computed by us, assuming that these samples are a probability sample of a wider population of twins.