Computerized Working Memory Training in Children With ADHD and Comorbid Tourette Syndrome

Inclusion Criteria: 1. The investigators will limit inclusion to youth between the ages of 7-13 who carry current diagnoses of ADHD+TS and who have a treating physician at a Partners affiliated hospital or clinic. 2. The investigators will include youth who have undergone neuropsychological testing in the prior 3 years. Exclusion Criteria: 1. The investigators will exclude patients with intellectual disability in order to more directly extend the prior literature to the ADHD+TS population. 2. The investigators will exclude patients with severe tics as evidenced by a score of \> 30 on the clinician administered Yale Global Tic Severity Scale (YGTSS). 3. The investigators will exclude patients with moderate to severe Obsessive Compulsive Disorder (OCD) symptoms, as evidenced by a score of \>30 on the clinician administered Children's Yale-Brown Obsessive Compulsive Scale (CYBOCS). 4. The investigators will exclude patients treated with neuroleptics, given that these medications can be cognitively dulling and sedating and potentially lead to secondary working memory impairments. 5. The investigators will exclude families who do not have a computer with an internet connection in their homes, and in which neither a parent nor the child has an email address to receive study related communications. 6. The investigators will exclude families who anticipate or are likely to have a change in therapeutic treatments (i.e., psychotherapy or psychopharmacology) during the time frame of the trial. NOTE: Patients treated with ADHD medications will not be excluded, but medications will be recorded for covariate analysis.