Evaluates the efficacy of two training procedures for eliminating selective stimulus control observed with three trainable mentally retarded children. In another experiment, improvements in stimulus control were not a function of varying degrees of difficulty between stimulus sets or of a prior history of discrimination training with the less…

Effective instructional strategies used to teach language skills to 24 elementary aged students with autism or moderate mental retardation included the use of choral responding; the use of student-to-student responding; the frequent rotation of materials while teaching 2 to 3 concepts; and the use of random, unpredictable trials for student…