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Commun Sci Disord. 2012;17(2): 274-289.
A Meta-Analysis of Lexical Processing in Groups with Autism Spectrum Disorders
Minkyung Kang` , Soobok Lee` , Young Tae Kim` , and Dongsun Yim`
Copyright ©2012 The Korean Academy of Speech-Language Pathology and Audiology
강민경(Minkyung Kang)| 이수복(Soobok Lee)| 김영태(Young Tae Kim)| 임동선(Dongsun Yim)
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Background & Objectives
The lexical processing of groups with Autism spectrum disorders(ASD) has specificity in comparisonto their other language skill. Therefore, it is difficult to obtain consistent results for lexical processing in groups with ASD. The results can vary depending on the subgroups of ASD, stimuli modes, and task types. The purpose of this meta-analysis study was to systematically investigate the results of previous studies on the lexical processing ability in groups with ASD.
Using Meta-Analysis(CMA2, Comprehensive Meta-Analysis-Ⅱ, 2005), a systematic literature review approach was taken. There were 14 studies which met the inclusive and exclusive criteria of our research. The effect sizes for ASDs and overall typical developmental(TD) abilities for lexical processing were analyzed via a random effect model.
The results of this study revealed that word recognition and lexical decisions were the most commonly used tasks. In addition, the general target populations for lexical processing were high functioning autism(HFA) and Asperger’ syndrome(AS). There were three main findings from our study results. First, the meta-analysis results indicated that the overall lexical processing abilities were not significantly different between ASD and TD. Second, there were no significant differences in the results based on stimuli modes. Lastly, there were no significant differences in the results depending on the task types.
Discussion & Conclusion
Our findings suggest that there was not a significant difference between the ASD’ and TD’ overall lexical processing abilities. Therefore, the results should provide an evidence-based rationale for the ASD group’ vocabulary intervention.
Keywords: 어휘처리 | 메타분석 | 자폐범주성장애 | 단어재인 | 어휘판단 | 그림이름대기 | lexical processing
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