Supplementary Online Material

Correlation Matrices

(a)  Pearson correlations of enhancers with social functioning variables

Variable / 1 / 2 / 3 / 4 / 5 / 6 / 7
1. APQ Parent Involvement / _ / .58** / .08 / .27** / .17** / .35** / .22**
2. APQ Positive Parenting / _ / .05 / .03 / .08 / .23** / .16**
3. Harter Social Acceptance / _ / -.04 / .12* / .09 / .29**
4. Activity Breadth / _ / .12* / .21** / .08
5. Activity Intensity / _ / .09 / .16**
6. P-SSIS / _ / .31**
7. Y-SSIS / _

(b)  Pearson correlations of risk factors with social functioning variables

Variable / 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9
1. DBD – ADHD severity / _ / .59** / .48** / -.02 / -.01 / .17** / .17** / -.27** / .02
2. DBD – ODD severity / _ / .70** / .16** / .03 / .11* / .34** / -.51** / -.21**
3. DBD – CD severity / _ / .10 / .01 / .004 / .34** / -.50** / -.25**
4. RADS Total T-score / _ / .46** / .08 / .07 / -.16** / -.34**
5. MASC Anxiety Index / _ / .09 / -.003 / .03 / .01
6. CAARS ADHD Index / _ / .21** / -.03 / .12*
7. APQ Negative Parenting / _ / -.30** / -.18**
8. P-SSIS / _ / .31**
9. Y-SSIS / _

Note: *Correlation is significant at the 0.05 level (2-tailed). **Correlation is significant at the 0.01 level (2-tailed). APQ = Alabama Parenting Questionnaire; P-SSIS = parent report on the Social Skills Improvement System Rating Scale; Y-SSIS = youth report on the Social Skills Improvement System Rating Scale; DBD = Disruptive Behavior Disorders rating scale; ADHD = attention deficit/hyperactivity disorder; ODD = oppositional defiant disorder; CD = conduct disorder; RADS = Reynolds Adolescent Depression Scale-2; MASC = Multidimensional Anxiety Scale for Children; CAARS = Conners’ Adult ADHD Rating Scales.