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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: J Abnorm Child Psychol. 2014 Nov;42(8):1299–1311. doi: 10.1007/s10802-014-9886-5

Table 4.

Intraclass and Cross-twin Cross-trait Correlations for Aggression, Rule-breaking, and Negative Parenting

1 2 3 4 5 6
1. Aggression- a - 0.62 0.30 0.42 0.33 0.19
2. Rule-breaking- a 0.57 - 0.25 0.33 0.44 0.18
3. Negative parenting- a 0.37 0.30 - 0.19 0.18 0.47
4. Aggression- b 0.68 0.46 0.32 - 0.62 0.30
5. Rule-breaking - b 0.46 0.68 0.22 0.57 - 0.25
6. Negative parenting- b 0.32 0.23 0.58 0.38 0.30 -

Note. a = twin a; b = twin b; MZ correlations are below the diagonal, DZ correlations are above.

Intraclass correlations are in bold. Cross-twin cross-trait correlations are highlighted in blue.