1. Effects of peer-delivered self-instructional training on a lunch-making work task for students with severe disabilities;Agran;Education and Training in Mental Retardation,1992
2. Vibration as a reinforcer with a profoundly retarded child;Bailey;Journal of Applied Behavior Analysis,1969
3. Automated reinforcement of head posture in two cerebral palsied retarded children;Ball;Perceptual and Motor Skills,1975
4. Improving the work performance of severely/profoundly retarded young adults: The use of a changing criterion procedural design;Bates;Education and Training of the Mentally Retarded,1980