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Auditory stream segregation in children with Asperger syndrome
T Lepistö1, A Kuitunen, E Sussman
1Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, P.O. Box 9, Helsinki FIN-00014, Finland. tuulia.lepisto@hus.fi
Biological Psychology
|September 16, 2009
Summary
Children with Asperger syndrome (AS) struggle with auditory stream segregation, a basic sound separation skill. This difficulty may explain why they have trouble understanding speech in noisy environments.
Area of Science:
- Neuroscience
- Developmental Psychology
- Audiology
Background:
- Individuals with Asperger syndrome (AS) frequently exhibit challenges in speech perception within noisy settings.
- This difficulty suggests potential underlying auditory processing deficits.
Purpose of the Study:
- To investigate if impaired auditory stream segregation contributes to speech-in-noise difficulties in children with AS.
- To explore the basic auditory processing capabilities related to sound source separation in AS.
Main Methods:
- Auditory event-related brain potentials (ERPs) were recorded from school-aged children with AS and age-matched controls.
- A specialized paradigm was employed to assess auditory stream segregation abilities.
- ERPs were analyzed during both stream segregation tasks and simple feature discrimination tasks.
Main Results:
- Significant differences in ERP component amplitudes were observed between children with AS and controls specifically during auditory stream segregation conditions.
- No significant group differences were found for simple auditory feature discrimination tasks.
- Children with AS demonstrated impaired ability to segregate concurrent sound streams.
Conclusions:
- The findings suggest that difficulties in auditory stream segregation are present in children with Asperger syndrome.
- This deficit in separating simultaneous sounds may be a contributing factor to their challenges with speech-in-noise perception.
- Further research into auditory processing in AS is warranted to understand and address these perceptual challenges.
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