Children who use 30 to 100 pictures often begin speaking while handing over their selected pictures

„These authors claimed that children who use 30 to 100 pictures often begin speaking while handing over their selected pictures. They claimed that 30% of users begin to use single word utterances while using PECS, and 59% develop independent speech if training begins before age 5 and continues for at least a year (Bondy&Frost, 1994b)”

Bondy, A. & Frost, L. 1994 b The picture exchange communication system. Focus on Autistic Behavior, 11, 1-19

Źródło: Assessing Topography-Based Versus Stimulus-Selection-Based Verbal Behavior: A Comparison From the Literature” Bloh. Ch., Behavior Analysis: Research and Practice 2016, Vol. 16, No. 1, 16

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