Effect of Working Memory Training on ADHD Brain Function

Inclusion Criteria: * Participants will be 13-17 years old and \>6th grade English reading level to complete self-report evaluations (most are only available in English). ADHD-C participants must meet DSM-IV criteria (314.01). Exclusion Criteria: * Head injury sufficient to have caused \>30 minutes lost consciousness; past or current CNS disease (e.g. stroke, MS, epilepsy or any repeated seizure history, tumor, etc) or brain lesion identified by MR (structural MR scans will be reviewed by a radiologist for the presence of clinical neuropathology that may affect cognitive task performance); Axis I DSM-IV lifetime history Bipolar disorder, psychotic disorder, OCD, PTSD, Tourette's disorder, Pervasive developmental disorder (e.g., Autistic disorder, PDD NOS, etc.); current DSM-IV substance dependence, Major Depressive Disorder or anxiety disorder; hypertension or juvenile-onset diabetes (current treatment with antihypertensives or insulin); current pregnancy (menstruating females will be tested); IQ estimate \<80; left-handedness; psychotropic medication other than common psychostimulants that act primarily on dopamine neurotransmission systems. For instance, ADHD-C medications such as Wellbutrin (Buproprion), Strattera (Atomoxetine HCl), Cylert (Pemoline), or Provigil (Modafinil) will exclude participation; report of psychotic illness in first degree relative. Note, current DSM-IV disorders serve as exclusionary criteria to avoid the possibility of acute brain activity diffe…