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Twin Similarity for Positive Affect and the Empathy Composites
| Intraclass correlations |
||
|---|---|---|
| Compositesa | MZ | DZ |
| Positive affectb | .56 | .49 |
| Helping | .18 | .20 |
| Concern | .48 | .35 |
| Hypothesis testing | .57 | .38 |
Note. MZ = monozygotic (identical) twins; DZ = dizygotic (fraternal) twins. Effects of sex were regressed out.
N = 67 MZ pairs and 140 DZ pairs.
n = 82 MZ twin pairs and 172 DZ pairs.
