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Related Experiment Video

Updated: May 10, 2026

Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease

Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease

Published on: August 30, 2011

Episodic memory retrieval for story characters in high-functioning autism.

Hidetsugu Komeda¹, Hirotaka Kosaka, Daisuke N Saito

¹The Hakubi Center for Advanced Research, Kyoto University, Kyoto, Japan. komeda.hidetsugu.5w@kyoto-u.ac.jp.

Molecular Autism

|June 27, 2013

Summary

Memory retrieval in autism spectrum disorder (ASD) and typically developing (TD) individuals was examined. Both groups showed enhanced memory when story protagonists matched their own characteristics, indicating a similarity effect in episodic memory.

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A Real-world What-Where-When Memory Test

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A Real-world What-Where-When Memory Test

A Real-world What-Where-When Memory Test

Published on: May 16, 2017

Area of Science:

Cognitive psychology
Neurodevelopmental disorders
Autism spectrum disorder (ASD) research

Background:

Previous research indicates personality similarity enhances reading comprehension.
The impact of similarity on memory retrieval, particularly in autism spectrum disorder (ASD), is not well understood.
This study investigated the 'similarity hypothesis' in relation to episodic memory retrieval in ASD and typically developing (TD) individuals.

Purpose of the Study:

To investigate differences in episodic memory retrieval between individuals with ASD and TD individuals.
To test whether memory retrieval is enhanced when readers engage with stories featuring protagonists with similar characteristics (ASD-congruent or TD-congruent).

Main Methods:

Participants included 18 high-functioning individuals with ASD and 17 age- and IQ-matched TD individuals.
Participants read 24 stories, half featuring protagonists with ASD characteristics and half with TD characteristics.
Episodic memory was assessed using a sentence recognition task after story encoding.

Main Results:

No significant differences were found between ASD and TD groups in memory encoding processes (reading times, readability).
Significant differences emerged in memory retrieval, specifically in response times.
While accuracy was comparable, individuals with ASD showed different response time patterns compared to TD individuals.

Conclusions:

Individuals with ASD demonstrated more effective retrieval of ASD-congruent sentences compared to ASD-incongruent ones.
TD individuals showed more effective retrieval of TD-congruent stories compared to ASD protagonists.
The similarity effect significantly influenced memory retrieval differently across ASD and TD groups.