학술논문
Impaired Timing and Frequency Discrimination in High-functioning Autism Spectrum Disorders.
Document Type
Article
Source
Subject
*ANALYSIS of covariance
*ANALYSIS of variance
*AUDITORY perception
*AUTISM
*CHI-squared test
*STATISTICAL correlation
*NONPARAMETRIC statistics
*REGRESSION analysis
*RESEARCH funding
*STATISTICS
*T-test (Statistics)
*TIME
*U-statistics
*TASK performance
*PERCEPTUAL disorders
*DATA analysis software
*DISEASE complications
*ADOLESCENCE
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Language
ISSN
0162-3257
Abstract
Individuals with autism spectrum disorders (ASD) frequently demonstrate preserved or enhanced frequency perception but impaired timing perception. The present study investigated the processing of spectral and temporal information in 12 adolescents with ASD and 15 age-matched controls. Participants completed two psychoacoustic tasks: one determined frequency difference limens, and the other determined gap detection thresholds. Results showed impaired frequency discrimination at the highest standard frequency in the ASD group but no overall difference between groups. However, when groups were defined by auditory hyper-sensitivity, a group difference arose. For the gap detection task, the ASD group demonstrated elevated thresholds. This supports previous research demonstrating a deficit in ASD in temporal perception and suggests a connection between hyper-sensitivity and frequency discrimination abilities. [ABSTRACT FROM AUTHOR]