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
- Being an identical or fraternal twins
- Our Classification
-
-
- Operationalization
- A Identical twins
a male
b female
B Fraternal twins
a male
b female
Observed Relation with Happiness
Identical twin M = 6,11 M = 6,28 M = 6,21
Fraternal twin M = 6,03 M = 6,12 M = 6,08
Identical twin 65% 77% 72%
Fraternal twin 69% 76% 73%
Identical twin 83% 77% 80%
Fraternal twin 75% 81% 79%
Significance tests computed by us, assuming that these samples are a probability sample of a wider population of twins.