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Also, the same word was taught for five days in both the PECS and the sign session and the results were recorded. This study compares the relative efficacy of PECS and an i Pad/SGD with three preschool-aged children with autism spectrum disorder and limited functional speech who lived in Malta. The effects of the intervention were evaluated using a multiple baseline design across participants. Social validity questionnaires indicated that teachers and parents found the social communication skills to be important and that this intervention was helpful. These occurred: 6 weeks before teaching; during the week immediately prior to teaching; during the week immediately following teaching. Picture Exchange Communication (PECS) Training for young children: Does training transfer to school and to home? Abstract: The limited communicative abilities of young children with autism and developmental disabilities may be enhanced by augmentative communication systems such as the Picture Exchange Communication System (PECS).