children with autism use fewer and less complex gestures than their peers without disabilities they may use gestures and verbal communication to make requests and protest, but rarely make attempts to share attention or communicate for social purposes
play after each phase of PECS training. At the conclusion of the study, generalization was measured at a convenience store with a stranger (generalization of both location and audience). Finally, follow-up measurements of PECS use at 1, 12, and 18 months were taken. All 4 participants used PECS more frequently during all generalization measures compared to baseline. However, the frequency of their use varied by the child and environment. Greenberg et al. employed an “In sight out of reach” method