Gist-based illusions within and across stimulus modalities in autism spectrum disorder

Area of Science:

• Cognitive Psychology
• Neurodevelopmental Disorders

Background:

• Previous research indicates variable false recognition (FR) rates in autism spectrum disorder (ASD) compared to controls.
• The underlying reasons for these discrepancies in FR findings remain unclear.

Purpose of the Study:

• To investigate the hypothesis that impaired episodic memory functions contribute to altered FR rates in individuals with ASD.
• To examine the relationship between episodic and semantic memory performance and FR in ASD.

Main Methods:

• Utilized an adapted Deese, Roediger and McDermott paradigm with word, picture, and word-picture pair lists.
• Measured episodic memory (hits, false alarms) and semantic memory (FR) performance in individuals with ASD and comparison participants (CPs).

Main Results:

• Autism spectrum disorder (ASD) individuals exhibited a decreased rate of false recognition (FR) with word lists.
• This decreased FR in ASD was associated with increased hits and decreased false alarms (FAs), indicating intact item information acquisition.
• Comparison participants (CPs) showed higher FR rates with word-picture pairs.

Conclusions:

• Impaired episodic memory functions in ASD may limit the acquisition of item-specific information.
• This limitation could hinder the formation of semantic links, potentially reducing susceptibility to false recognition (FR).
• Findings suggest a nuanced relationship between memory systems and false recognition in autism spectrum disorder.