Brain Training in Children With/At-risk for Attention-Deficit/Hyperactivity Disorder and Executive Function Impairment

The purpose of this study is to determine if different forms of child-friendly, computer-based puzzles and games ("brain training") targeting executive function (EF) skills (i.e., thinking, problem-solving) result in improvements in EF in preschool children with or at-risk for Attention-Deficit/Hyperactivity Disorder (ADHD) and EF problems. The investigators hypothesize that children receiving active "brain training" will show greater improvements in EF and related skills immediately after treatment than children receiving passive "brain training." The investigators are also interested in whether any improvements in EF and related skills occur or are maintained at 3 and 6 months after completion of brain training.