2005 Fiscal Year Final Research Report Summary
Development of Language Learning Program based on Analysis of Phonological Processing Abilities of the Children with developmental Phonological Disorders.
| Project/Area Number |
15530629
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Special needs education
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| Research Institution | Sophia University |
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Principal Investigator |
HIRAI Sawako Sophia University, Faculty of Foreign Studies, Lecturer, 外国語学部, 講師 (50286390)
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| Co-Investigator(Kenkyū-buntansha) |
IITAKA Kyoko Sophia University, Faculty of Foreign Studies, Professor, 外国語学部, 教授 (40014716)
ARAI Takayuki Sophia University, Faculty of Science and Technology, Assistant Professor, 理工学部, 助教授 (80266072)
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| Project Period (FY) |
2003 – 2005
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| Keywords | phonological disorder / speech processing / ability in speech perception / acoustic property / phonological processing ability / children with phonological disorder / language learning support / development of the program |
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| Research Abstract |
【Purpose】 We investigated the perceptual weighting of syllable-initial fricatives for native Japanese adults and for children with persistent developmental articulation disorder to elucidate the mechanism behind the disorder and to identify an effective treatment.
【Method】 Forty-two native Japanese adults and 2 native Japanese children with developmental phonological disorder identified tokens from a /∫/ - /s/ continuum followed by /α/ as /∫α/ or /sα/. Stimuli consisted of natural /s/ and /∫/ noises combined with synthetic /α/ vocalic portions. In order to create the consonant portion, /s/ and /∫/ were separated from /∫α/ and /sα/ syllables recorded by a native Japanese male speaker. These spectra of fricative noises were varied along a nine-step continuum, from one appropriate for /∫/ to one appropriate for /s/. Nine synthetic vocalic portions were created using XKL Klatt, 1984) to form a nine-step continuum, varying in formant transitions changing continuously from one most like /∫/ to one most like /s/.
【Results & Discussion】 Most adults weighted to the spectrum of the fricative noise more than to formant transitions in the same manner as English native adults, however, as compared with most adults, a small number of adults and the children with persistent developmental articulation disorder judged based more on the formant transitions than on the spectrum of the fricative noise like 3- to 4-year-old typically developing English native children (Nittrouer & Miller, 1997).
【Conclusion】 The perceptual weight assigned by adults suggested that they did not perceive uniformly. The perceptual weight assigned by children with developmental phonological disorder indicated that their speech perception ability might develop differently from that of typically developing children because of speech processing deficits.
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