Impaired nonverbal working memory in high-functioning autism spectrum disorder.

Area of Science:

• Neurodevelopmental Disorders
• Cognitive Psychology
• Autism Spectrum Disorders Research

Background:

• Previous research indicates inconsistent findings regarding working memory deficits in high-functioning Autism Spectrum Disorders (ASD).
• Verbal responses in assessments may confound working memory evaluations in individuals with ASD.
• This study addresses these inconsistencies by utilizing non-verbal working memory tasks.

Purpose of the Study:

• To investigate non-verbal working memory performance in high-functioning Autism Spectrum Disorders (ASD).
• To compare working memory capabilities between individuals with high-functioning ASD and typically developing individuals.
• To explore the correlation between working memory and social interaction deficits in high-functioning ASD.

Main Methods:

• A cross-sectional, comparative study design was employed.
• Participants included 30 individuals with high-functioning ASD (ages 7-16) and 30 typically developing controls, matched for age and gender.
• Non-verbal working memory subtests from the Leiter International Performance Scale-Revised were administered.

Main Results:

• Individuals with high-functioning ASD demonstrated significant impairment in the Reverse Memory subtest, even after controlling for full-scale intelligence quotient (FSIQ).
• Both Forward Memory and Reverse Memory tasks showed a significant positive correlation with the Social Interaction subscale of the Gilliam Autism Rating Scale (Second Edition).
• Statistical analyses included ANOVA, ANCOVA, repeated measures ANOVA, and Pearson's correlation coefficient (p<0.05).

Conclusions:

• Non-verbal working memory appears to be impaired in individuals with high-functioning Autism Spectrum Disorders.
• Task complexity and cognitive load are potential factors influencing working memory performance in this population.
• Further research is warranted to understand the nuances of working memory in ASD.