Comparing Contingent Vocal Imitation and Contingent Vocal Responses to Increase Verbal Communication in Young children with Autism Spectrum Disorder

Abstract

Individuals diagnosed with Autism Spectrum Disorder (ASD) have difficulties in forming functional communication. The purpose of this study was to replicate Ishizuka and Yamamoto (2016) to determine which intervention, contingent vocal imitation or contingent vocal responses, produced the highest level of vocalizations of young children diagnosed with ASD in a play-based setting. For the contingent vocal response treatment phase, the experimenter vocally responded to each child vocalization with a response that was topographically different than the child’s response. For the contingent vocal imitation treatment phase, the experimenter vocally imitated the child’s vocalization with a topographically identical response. Two children diagnosed with ASD, ages 41 and 57 months, participated in this study. An alternating treatment design was used to compare the effects of each treatment on increasing child vocalizations. . Results indicated that contingent vocal imitation resulted in a higher number of child vocal imitations for both children. Results also indicated that contingent vocal responses and contingent vocal imitation produced comparable levels of overall vocalizations, which replicated the findings of Ishizuka and Yamamoto (2016).