본 연구는 확장된 환경중심 언어중재(Enhanced Milieu Teaching : EMT) 가 발달장애 아동의 의사소통 능력에 미치는 효과를 알아보는 데 있다. 연구 대상은 발달장애 유아 3명이다. 실험은 대상자간 중다기초선 설계를 하여, 중재와 유지 효과가 있는지 알아보았다. 그 결과 확장된 환경중심 언어중재전략은 아동의 자발발화, 평균발화길이(MLU), 새로운 어휘 습득의 증가에 영향을 미치는 것으로 나타났다. 본 연구에서 사용한 EMT는 기존의 환경중심언어중재를 보완한 방법으로 과거의 단순한 요구하기 등 특정 목표 언어만이 아니라 평균발화길이, 어휘 및 구문 확장, 등 좀 더 포괄적인 발화 능력을 향상시키는데 목표를 두고 있다.

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This study examined the effects of enhanced milieu teaching on social communication of young children with developmental disabilities. The target population for this study was those children who were developmentally delayed more than one year in the area of expressive language examination. We measured spontaneous utterances, MLU, and new vocabulary acquisition of the participating children to investigate the intervention effects. The techniques used for the intervention included modeling, mand-modeling, time delay, incidental learning, language expansions, turn-taking, following children lead, and responsive feedback. Spontaneous utterance, MLU, and new vocabulary acquisition were all audiotaped and typed.
The results of this study were as follows : First, when Enhanced milieu teaching was implemented, all three children who participated in this study showed improved results in all domains compared to baseline. Second, the results were also constant in other environmental situation, demonstrating generalization effects of the intervention. Third, the effect effects were maintained after three weeks of the completion of the study, and thus it was concluded that the learned skills were carried after the intervention was discontinued. However, there were some discrepancies existing in between some domains with regards to acquiring new vocabulary due to the fact that there was not many toys available and types of play. It is suggested that supports for parents is essential in generalizing the tasks.

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