Abstract
This study is aimed to explore the present condition of use and effects of AAC by systematic review and meta-analysis for children with autism by investigating 24 studies in Taiwan. The systematic literature review and Percentage of Non-overlapping Data (PND) were used. Results indicated that (1) AAC were used in preschool, elementary and secondary school level, AAC used in non-speech and limited-speech children with autism; (2) The results in meta-analysis indicated that, overall, AAC interventions had large effects on communication. However, the effects of PECS and manual signs were greater than SGD; (3) The effects of secondary school level and elementary school level were greater than preschool level, girls were greater than boys, non-speech participants were greater than the limited-speech.