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ORIGINAL ARTICLE
Commun Sci Disord. 2005;10(1): 1-24.
A Longitudinal Study of Predictors for Expressive Vocabulary Development of Late-Talkers
Gyung Hun Hong` , and Young Tae Kim`
Copyright ©2005 The Korean Academy of Speech-Language Pathology and Audiology
홍경훈(Gyung Hun Hong)| 김영태(Young Tae Kim)
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ABSTRACT
The purpose of this study was to identify the assessment variables for predicting expressive vocabulary development of late-talkers. Forty-one late-talkers between 18 and 30 months old at the time of intake participated in this study. These participants were initially identified as late-talkers because their expressive vocabulary sizes scored below -1SD on the MCDI-K. Descriptive assessment variables(e.g., overall rate of communicative intentions, size of communicative intention inventories, rate of communicative gestures, number of different words and proportion of consonants in communicative utterances) and psychometric assessment variables(e.g., expressive and receptive language development scores from the ‘Sequenced Language Scale for Infants’) were measured at intake. Six months after intake, each participant received a follow-up, in which the MCDI-K measured the participants’ expressive vocabulary size again. The follow-up data indicated that 18 late-talkers caught up with their normal peers(denoted as late-bloomers) while the other 23 continued to show signs of expressive vocabulary delay(denoted as truly-delayed). The results of this study showed that late-bloomers and truly-delayed children significantly differed in all the following variables except for SELSI’s receptive language development scores: overall rate of communicative intentions, size of communicative intention inventories, rate of communicative gestures, NDW, proportion of consonants and SELSI’s expressive language development scores. According to discriminant analyses, the size of communicative intention inventories proved the most significant predictor in all variables and NDW proved the most significant predictor in verbal-related variables. However, expressive language development scores, using SELSI, proved the most significant predictor in SELSI-related variables.
Keywords: ‘말늦은아동’ | 표현어휘발달 예측요인 | 의사소통의도 유형율 | late-talker | assessment variables for predicting expressive vocabulary development | communicative intention inventories
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