Kravits, T. R., Kamps, D.M., & Kemmerer, K. (2002). Brief report: Increasing communication skills for an elementary‐aged student with autism using the picture exchange communication system.

Journal of Autism and Developmental Disorders, 32, 225‐230.
Abstract: Communication and interactions with others are a few of the hardest tasks for an autistic child. This study showed how the gap may be bridged by using a system called the Picture Exchange Communication System (PECS). Lee Mas...