Abstract
Autism Spectrum Disorder (ASD) is a pervasive developmental disorder including abnormalities in perceptual processing. We measure perception in a battery of tests across speech (filtering, phoneme categorization, multisensory integration) and music (pitch memory, meter categorization, harmonic priming). We found that compared to controls, the ASD group showed poorer filtering, less audio-visual integration, less specialization for native phonemic and metrical categories, and a higher instance of absolute pitch. No group differences were found in harmonic priming. Our results are discussed in a developmental framework where culture-specific knowledge acquired early compared to late in development is most impaired, perhaps because of early-accelerated brain growth in ASD. These results suggest that early auditory remediation is needed for good communication and social functioning.
Highlights
Autism Spectrum Disorder (ASD) is a pervasive developmental disorder that includes abnormalities in perceptual processing [1], language and communication [2], and social interaction [3]
The interaction between condition and group remained significant, F(1, 51) = 3.86, p = .05, c2 = .070. These results indicate that even after accounting for receptive vocabulary, those with ASD still show a smaller difference in performance between simple and complex meter compared to controls
Relative to typically developing adolescents, we found that adolescents with ASD were impaired on some auditory tasks but not on others, forming a profile by which we can further our understanding of auditory processing in this disorder
Summary
Autism Spectrum Disorder (ASD) is a pervasive developmental disorder that includes abnormalities in perceptual processing [1], language and communication [2], and social interaction [3]. ASD is associated with a particular processing style in which local stimuli details are very well processed, sometimes at the expense of global processing [8]. Those with ASD tend to perform better than those without ASD on tasks such as finding visual embedded figures [9,10,11]. Leiter international performance scale [95] This standardized test measures non-verbal intelligence through the use of visualization and reasoning. Peabody picture vocabulary test-III [93] This standardized test measures receptive vocabulary through the use of pictures and took approximately 25 minutes to complete
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