Figure 4.

The top panel shows combined arranging and ordering and completeness responses per minute (filled circles, primary y axis) and the percentage duration of item engagement (open circle, secondary y axis) during Jim's treatment evaluation. BL  =  baseline, MI  =  matched items, RB  =  response blocking; the asterisk indicates the point at which separate play skills training sessions were conducted (between Sessions 12 and 13). Letters in the teacher implementation phase represent sessions conducted by different teachers (Teacher A and Teacher B). The bottom panel shows the rate of vocal and model (filled circles) and physical (open circles) prompts.