Both picture exchange communication (PEC) and voice-output communication aide (VOCA) are effective for preschoolers with autism.
PEC and VOCA are two common forms of augmentative and acquired communication (AAC). The authors designed this study to see which of these two forms of AAC worked best for preschoolers. The study found that AAC was an effective way of teaching preschoolers with autism to correctly request things. Since both PEC and VOCA are equally effective, they recommend letting the child decide which system they want to work with. This has the added advantage of letting the child feel included in the therapy decisions.
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