Improving Social Interaction for Adolescents With Autism During the Transition to Adulthood

Inclusion Criteria: * Age: 18-21 * DSM-IV-TR or DSM-5 diagnosis of an Autism Spectrum Disorder * IQ\>70 Exclusion Criteria: * Presence or history intellectual impairment (defined as IQ \<70) * Presence or history of medical, cardiac, or neurological disorders that may affect brain function (e.g., cardiac disease, endocrine disorders, renal disease, pulmonary disease, history of seizures or head trauma with unconsciousness for a period of 15 minutes or greater or CNS tumors) * Presence of sensory limitation including visual (e.g., blindness, glaucoma, vision uncorrectable to 20/40) or hearing (e.g. hearing loss) impairments that interfere with assessment * Not proficient in English * Presence of substance abuse in the past one month * Presence of substance dependence not in remission for the past six months * Contraindications for tDCS (e.g., pregnancy or implanted devices such as pace maker)