Definition of "PECS"

Sandra had two boys in the autism class. Arriving to the school, one of her sons was non-verbal; he had been trained to communicate using the picture exchange communication system (PECS). […] Her son lost his PECS skills. She was also upset to learn that her son had been placed in a personalised sensory space without her permission.

2022 September 12, Jennifer Morgan, “An autism class opens. What happens then?”, in Irish Examiner‎