This study will investigate and confirm the efficacy of two psychological treatments for adults with autism spectrum disorder. Cognitive Enhancement Therapy (CET) is a cognitive remediation intervention that aims to help adults with problems in thinking, planning, and socialization. Enriched Supportive Therapy (EST) is an individual supportive therapy that aims to help adults learn about their condition, manage their emotions and stress, improve their social skills, and cope with everyday problems.

Autism spectrum disorder (ASD) is characterized by marked impairments in social and non-social cognitive ability that persist well into adulthood and contribute to significant functional disability. The treatment of ASD has focused almost exclusively on children, and few empirically supported interventions are available to address the core cognitive and functional challenges individuals with ASD face as they transition to adulthood. This study will investigate and confirm the efficacy of two psychological treatments for adults with autism spectrum disorder. Cognitive Enhancement Therapy (CET) is a cognitive remediation intervention that aims to help adults with problems in thinking, planning, and socialization. Enriched Supportive Therapy (EST) is an individual supportive therapy that aims to help adults learn about their condition, manage their emotions and stress, improve their social skills, and cope with everyday problems.

Participation in this study will last 30 months. Potential participants must be able to attend weekly treatment sessions in Pittsburgh, PA.

The study design is a 30-month (2.5 years) randomized-controlled confirmatory efficacy trial, where eligible participants will be randomized to the CET or EST study treatments. Participants will be treated with the study interventions for 18 months, and then followed for 12 additional months to assess the lasting impact of the study interventions. All participants will complete cognitive, clinical, and neuroimaging (magnetic resonance imaging) assessments prior to starting the study treatments and then at specified intervals thereafter to evaluate the impact of the study treatments on cognition, adaptive function, and the brain.

Inclusion Criteria:

• Age 16-45 years
• Diagnosis of autism, Asperger's syndrome, or pervasive developmental disorder not otherwise specified (NOS) verified by the autism diagnostic observation schedule (ADOS) or autism diagnostic interview-revised (ADI-R)
• Presence of significant social and cognitive disability, based on the Cognitive Style and Social Cognition Eligibility Interview (Hogarty et al., 2004)
• Intelligence quotient (IQ) greater than 80
• Ability to read and speak fluent English
• Availability of a family member or close friend allowed to provide information on the participant
• Ability to attend weekly treatment sessions in Pittsburgh, PA

Exclusion Criteria:

• Organic brain syndrome
• IQ < 80
• English language skills below a sixth grade level
• Persistent suicidal or homicidal behavior
• History of substance abuse or dependence within the past 3 months
• Comorbid attention deficit hyperactivity disorder (ADHD) that is untreated
• Comorbid personality disorder
• History of disruptive or violent behavior
• Any magnetic resonance imaging contraindications

Data will be shared through the National Database for Autism Research

Final data will be deposited to NDAR upon study completion.

Access will be available to qualified investigators and institutions who are eligible for access to NDAR.