Date of Award
Doctor of Education
Instruction & Curriculum Leadership
The present study used a multiple probe across behaviors design, with an embedded alternating treatments design to compare the effects of two modified communication systems, the Picture Exchange Communication System (PECS) and a speech generating device, on requesting for a child with multiple disabilities, including autism and visual impairments. Both modalities were taught across the first three phases of PECS instruction (simple request, distance and persistence, and discrimination). During baseline the participant demonstrated little to no requesting across all three phases for either modality. During intervention requesting increased to proficient levels across all three phases for both modalities. Modified PECS, however, yielded noticeably faster results in the distance and persistence phase. Social validity and preference for each modality were also assessed. Both communication systems were found to be acceptable. Both the parent and participant showed preference for the modified PECS. The importance of social validity and modality preference is discussed.
Dissertation or thesis originally submitted to ProQuest
Caradine, Mallorie Hutton, "The Comparative Effects of Modified Augmentative and Alternative Communication Modalities on Requesting for a Child with Autism and Visual Impairments" (2021). Electronic Theses and Dissertations. 2487.