مشکلات ارتباطی کودکان درخودمانده و اثربخشی روش ارتباطی مبادله تصویر (پکس)

Many researches show that approximately 50 percent of all autistic children never acquire functional speech. Using Augmentative and Alternative communication System (AAC) is necessary for these children. The Picture Exchange Communication system (PECS) is a communication program that has become widely used, especially with children with autism. This paper, reports the results of a review of the empirical literature on PECS.