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ORIGINAL ARTICLE
Commun Sci Disord. 2001;5(2): 1-15.
The Effects of Phonetic Context and Stimulus Length on the Nasalance Score in Normal Adults
Minjung Kim` , Hyun-Sub Sim` , and Hong-Shik Choi`
Copyright ©2001 The Korean Academy of Speech-Language Pathology and Audiology
김민정(Minjung Kim)| 심현섭(Hyun-Sub Sim)| 최홍식(Hong-Shik Choi)
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ABSTRACT
The purpose of the present study was to examine (1) the effect of the phonetic context and stimulus length on the nasalance score, (2) the phonetic context and stimulus length in which nasalance scores do not fluctuate. For these purposes , this study used 40 normal adult s as subject s and analyzed nasalance scores in 17 different phonetic context s and with 6 different lengths . The result s were as follows. (1) T he highest nasalance score was found in sentences with nasal consonant s. (2) T he nasalance score changed depending on the types of vowel. T he nasalance score was higher in sentences with / i/ vowel than in those with / a/ or / u/ vowel. (3) T he nasalance score was influenced by the manner of articulation in oral con sonant s , but not by the place of articulation. The nasalance score was higher in sentences with back consonant s than in those with labial or frontal con sonant s . (4) T he nasalance score was influenced by the stimulus length. As the stimulu s length decreased, the nasalance score increased. (5) The test - retest reliability differed under different phonetic context s. It was higher in the context s of / i/ vowel, nasal consonant s and back con sonant s than in other context s . (6) T he test - retest reliability increased as the stimulus length increased. T hese result s may indicate that in addition to the percentage of nasal consonant s, the characteristics of vowel, the percentage of back consonant s and the effect of stimulu s length should be con sidered in the interpretation of the nasalance score and in the development of test stimuli.
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