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Correlational findings

Study Plomin et al. (1993): study US Colorado 1986

Public:
Same-sex twins, Colorado, United States, followed from 14 to 20 months, 1986-1989
Sample:
Respondents:
N = 398
Non Response:
Assessment:
Behavioural observation
At 14 months: observation at home, 2 weeks later observation in laboratory

Correlate

Authors's label
Gender
Our Classification
Operationalization
1 male
0 female

Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks A-AB-mi-tsb-?-4-a DM = -               14 months   20 months
boys:         M=0.89      M=1.05
girls:        M=1.01      M=1.09
- difference:  -0.12       -0.04
A-CA-mi-tsb-v-7-a DM = -               14 months   20 months
boys:         M=4.6       M=4.9
girls:        M=4.9       M=5.0
- difference:  -0.3        -0.1