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Vocalization of Emotional and Social Expressions in Korean-Speaking Toddlers with Autism Spectrum Disorder and Those with Developmental Delay.

Yonsei Med J. 2018 May;59(3):425-430

Authors: Lee KS, Shin YJ, Yoo HJ, Lee GJ, Ryu J, Son O, Cho SW

PURPOSE: This study aimed to examine the development of socializing and emotional expressions through vocalizations and joint attention (JA) behaviors in Korean-speaking children with autism spectrum disorder (ASD), compared to those with developmental delay (DD).
MATERIALS AND METHODS: Video samples were collected from 28 toddlers with ASD and 18 age-matched toddlers with DD, and vocalizations were each coded in detail for the purpose of this retrospective research. In addition to some statistical analysis, Computerized Language Analysis was conducted to obtain the final results.
RESULTS: Although they produced a higher number of vocalizations than the DD group, the ASD group did not engage in emotional or social interactions with their caretakers, whereas the DD group did. The children with ASD used more atypical vocalizations and socially unengaged vocalizations than the children with DD did. JA using vocalizations in the ASD group, in particular, was largely dyadic, with triadic types occurring at a significantly lower frequency than those in the DD group.
CONCLUSION: Results from this study indicate the importance of assessing early vocalizations in toddlers with ASD, suggesting that some common symptoms of ASD, such as lack of typical, emotional, and social functions in early vocalizations, could be used to develop screening and intervention programs related to ASD.

PMID: 29611405 [PubMed – in process]

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