Picture Exchange Communication System

A structured augmentative and alternative communication (AAC) system that teaches individuals to use pictures to communicate with others. Developed by Andrew Bondy and Lori Frost in 1985, PECS uses a series of six phases to teach individuals — typically children with autism or other developmental disabilities who are minimally verbal — to exchange picture cards for desired items, construct sentences, and eventually comment and respond to questions. PECS builds on the principle that communication is inherently social and requires an exchange between people, making it distinct from simple picture labeling. It is widely used in schools, clinics, and homes worldwide.