Memory for past events: movement and action chains in high-functioning autism spectrum disorders

Area of Science:

• Cognitive Psychology
• Neuroscience
• Clinical Psychology

Background:

• Individuals with autism spectrum disorder (ASD) may experience memory impairments.
• Obsessive-compulsive disorder (OCD) has been linked to memory deficits for actions.
• The interplay between ASD, OCD, and action memory is not fully understood.

Purpose of the Study:

• To investigate action memory in individuals with ASD.
• To examine how comorbid OCD affects action memory in ASD.
• To compare memory performance across ASD, ASD with OCD, and control groups.

Main Methods:

• Participants with ASD, ASD with comorbid OCD, and neurotypical controls were recruited.
• Participants observed or enacted actions while hearing corresponding phrases.
• An old/new recognition task was used to assess verbal memory for actions after a delay.

Main Results:

• ASD individuals with OCD showed reduced accuracy and slower responses, especially for simple actions.
• ASD individuals without OCD had greater difficulty with complex actions requiring pantomime or coordination.
• Performance differences suggest distinct motor trace organization in ASD based on OCD comorbidity.

Conclusions:

• The presence of OCD exacerbates action memory impairments in individuals with ASD, particularly for simple actions.
• Individuals with ASD without OCD show specific difficulties with complex action memory.
• Findings highlight the differential impact of OCD on motor memory in ASD.