[DOWNLOAD] "Acoustic Analysis of Speech of Persons with Autistic Spectrum Disorders" by Jeeva John * Book PDF Kindle ePub Free

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eBook details

• Title: Acoustic Analysis of Speech of Persons with Autistic Spectrum Disorders
• Author : Jeeva John
• Release Date : January 19, 2013
• Genre: Medical,Books,Professional & Technical,Science & Nature,
• Pages : * pages
• Size : 5595 KB

Description

This study investigated differences in prosodic characteristics between the speech of individuals with autism spectrum disorders (ASD) and typically developing (TD) controls, using both acoustic-phonetic and perceptual analyses. 4 individuals with ASD with ages ranging from 9 to 25 (3 males and 1 female) and 3 age- (+/- 1 year) and gender-matched TD controls with ages ranging from 10 to 25 were participants. Three sets of speech samples – spontaneous speech, imitated speech, and reading sample – were recorded. Acoustic-phonetic analyses were conducted on amplitude of prestressed voiced stop consonants and duration of word final fricatives of reading samples. Perceptual analyses were conducted on both the reading and spontaneous speech samples. Nine speech-language pathology graduate students rated the 7 speakers on naturalness, voice quality, rhythm, intonation, fluency, loudness, and overall intelligibility. The participants with ASD did not demonstrate a significant difference in the acoustic phonetic analyses when compared to the TD control participants. In the perceptual analyses, blind raters identified a significant difference in participants with ASD as compared to their TD controls in all characteristics except voice quality. The findings thus did not support amplitude of prestressed voiced stop consonants and duration of word final fricatives as appropriate acoustic markers of deviant prosody in the ASD population. In contrast, listeners were able to detect some prosodic differences in the speech of individuals with ASD; therefore, perceptual analyses may be used to guide future acoustic analyses for appropriate markers of prosodic deviances in the speech of individuals with ASD.

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