All statistical analyses were performed with SPSS for Macintosh, Version 16. After carefully inspecting **data** for out-of-range values and pulling 6 outliers in to within 3 SD of the mean (all within the CPT omissions variable), our initial step was to perform Pearson correlations (for continuous variables) or t-tests (for dichotomous PA variables) regarding the associations between baseline EF variables and follow-up criterion variables. Following a significant correlation or t-test, we used linear or (in the case of PA variables) binary logistic regression with EF measures as predictors and academic, social, and global impairment measures as criterion variables, first controlling for IQ and then controlling for group status (ADHD vs. comparison), both of which were assessed at baseline. On the basis of these initial regressions, we reasoned that because IQ deficits are inherent to ADHD, controlling for both IQ and group concurrently would constitute overcontrol (see Miller and Chapman 2001). Thus, we emphasize findings with the more stringent covariate of group status (ADHD vs. comparison). Finally, following a significant regression analysis, we added the interaction term of the EF predictor x group status as the last step in the equation, to test for moderation by ADHD status.