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  • Title: Increasing the vocalizations of individuals with autism during intervention with a speech-generating device.
    Author: Gevarter C, O'Reilly MF, Kuhn M, Mills K, Ferguson R, Watkins L, Sigafoos J, Lang R, Rojeski L, Lancioni GE.
    Journal: J Appl Behav Anal; 2016 Mar; 49(1):17-33. PubMed ID: 26640163.
    Abstract:
    This study aimed to teach individuals with autism spectrum disorder (ASD) and limited vocal speech to emit target vocalizations while using a speech-generating device (SGD). Of the 4 participants, 3 began emitting vocal word approximations with SGD responses after vocal instructional methods (delays, differential reinforcement, prompting) were introduced. Two participants met mastery criterion with a reinforcer delay and differential reinforcement, and 1 met criterion after fading an echoic model and prompt delay. For these participants, vocalizations initiated before speech outputs were shown to increase, and vocalizations generalized to a context in which the SGD was absent. The 4th participant showed high vocalization rates only when prompted. The results suggest that adding vocal instruction to an SGD-based intervention can increase vocalizations emitted along with SGD responses for some individuals with ASD.
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