Two experiments with five individuals having severe mental retardation identified some problems and limits in training reversals of previously learned discrimination tasks using stimulus control shaping methodology. (DB)

Seven adults with severe to profound mental retardation participated in match-to-sample discrimination training under three conditions. Results indicated that error-correction procedures improve performance through negative reinforcement; that error correction may serve multiple functions; and that, for some subjects, trial repetition enhances…

This study evaluated the Task Demonstration Model for teaching discrimination skills with three teachers and their students (adolescents and young adults with moderate to severe mental retardation). The intervention required students to respond simultaneously. Students increased their percentage and rate of correct responding as well as their…