Frost, L. & McGowan, J. (2011). Strategies for Transitioning From PECS to SGD. Part I: Overview and Device Selection.

Perspectives on Augmentative and Alternative Communication, 20, 114-120. Abstract : The Picture Exchange Communication System (PECS) is used to systematically teach functional communication through an evidence-based protocol. As a low-tech AAC system, PECS differs...