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CATEGORICAL PERCEPTION OF STOP CONSONANTS IN CHILDREN WITH AUTISM

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Date Issued:
2009
Abstract/Description:
The purpose of this study is to determine whether children with autism recognize the same perceptual voicing boundaries of stop consonants as normally developing children of the same age group. This was explored using three groups of participants: ten children with autism between the ages of 8-14, five typically developing children between the ages of 8-14, and five typically developing seven-year-old children. Children in all groups listened to initial stop consonant syllables with voicing contrasts, with voiced and voiceless cognates presented. The initial consonants were altered along a voice onset time continuum within the typically perceived boundaries of each consonant. Participants were instructed to select the box containing the letter of the initial consonant they perceive when they hear each syllable. Results revealed greater difference between the responses of the children with autism when compared with the older control group, than when compared with the younger children. The responses of the children with autism were more similar to those of the children in the second control group. This could be indicative of a delay in the children with autism of perception of the categorical boundaries along the dimension of voice onset time compared to typical children‟s perception of these consonants.
Title: CATEGORICAL PERCEPTION OF STOP CONSONANTS IN CHILDREN WITH AUTISM.
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Name(s): Bourdeau, Laura, Author
Ryalls, Jack, Committee Chair
University of Central Florida, Degree Grantor
Type of Resource: text
Date Issued: 2009
Publisher: University of Central Florida
Language(s): English
Abstract/Description: The purpose of this study is to determine whether children with autism recognize the same perceptual voicing boundaries of stop consonants as normally developing children of the same age group. This was explored using three groups of participants: ten children with autism between the ages of 8-14, five typically developing children between the ages of 8-14, and five typically developing seven-year-old children. Children in all groups listened to initial stop consonant syllables with voicing contrasts, with voiced and voiceless cognates presented. The initial consonants were altered along a voice onset time continuum within the typically perceived boundaries of each consonant. Participants were instructed to select the box containing the letter of the initial consonant they perceive when they hear each syllable. Results revealed greater difference between the responses of the children with autism when compared with the older control group, than when compared with the younger children. The responses of the children with autism were more similar to those of the children in the second control group. This could be indicative of a delay in the children with autism of perception of the categorical boundaries along the dimension of voice onset time compared to typical children‟s perception of these consonants.
Identifier: CFE0002796 (IID), ucf:48126 (fedora)
Note(s): 2009-08-01
M.A.
Health and Public Affairs, Department of Communication Sciences and Disorders
Masters
This record was generated from author submitted information.
Subject(s): autism
categorical perception
consonants
auditory perception
phonemic awareness
voice onset time
Persistent Link to This Record: http://purl.flvc.org/ucf/fd/CFE0002796
Restrictions on Access: campus 2014-07-01
Host Institution: UCF

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