Accumulating research has identified family behavioral interventions as an empirically supported psychosocial treatment for students with attention deficit hyperactivity disorder (ADHD). The mechanisms behind the effectiveness of these interventions, however, have been less well studied. The current study examined possible mediators of improvement…

This experiment tested the hypothesis that organizing arithmetic fact practice by equivalent values facilitates children's understanding of math equivalence. Children (M age = 8 years 6 months, N = 104) were randomly assigned to 1 of 3 practice conditions: (a) equivalent values, in which problems were grouped by equivalent sums (e.g., 3 + 4 = 7, 2…