Twelve proficient peer models without disabilities demonstrated a response chain for a targeted learning task each day and described the steps to three classmates with developmental disabilities, who observed. The peer models performed the response chains accurately and quickly and the students with disabilities acquired the response chains. (DB)

Co-workers of three job trainees with mental retardation used coincidental training procedures while completing their own jobs. Coincidental training resulted in improved accuracy of salad-making skills, but skill acquisition was very slow; subsequently, a model and a quality-control check were added, resulting in higher performance levels. (JDD)