A Comparison of Prompting Strategies to Teach Intraverbals to an Adolescent with Down Syndrome.

Ingvarsson and Hollobaugh (2011) investigated tact- or echoic-to-intraverbal transfer of stimulus control to "wh" questions for three preschool-aged boys with autism. The current study was a systematic replication of this study with an adolescent girl with Down syndrome. A multielement design was used to compare the effectiveness and efficiency of picture or echoic prompts presented on an iPad or in vivo to teach "wh" questions.