A long-term followup (from 26 to 57 months) of echolalia and correct question-answering was conducted with six mentally retarded adult subjects identified from three previously published studies. Echolalia was lower than in baseline in 80.6 percent of the followups. Issues related to the study of maintenance are discussed. (Author/DB)

The study evaluated the effects of a time-efficient reinforcer assessment package with three preschoolers with autism. Systematic assessment of children's reinforcers for correct responding virtually eliminated nontargeted maladaptive behaviors, and yielded expected improvements in accuracy. (Author/DB)

This response to four papers on the nature of reinforcement focuses on the implications for application of theory to practice. The response addresses: reversibility of single-incentive selective associations; response deprivation, reinforcement, and economics; the substitutability of reinforcers; and delay reduction. (DB)

Three adolescents with severe mental retardation were trained to request snacks from visible three-item snack sets. During subsequent stimulus control assessment sessions, one subject requested food items when no food items were present, two frequently requested a missing item when the two other items were visible, and all subjects requested…

Results of a study with four autistic students (ages five-nine) showed that a picture training procedure was effective in teaching a generalized response to questions for which the relevant cue was visible, whereas specific generalization programing was required for situations in which the relevant cue was not visible. (Author/DB)

Consequences were withheld for high-rate gesture requests of 6 mentally handicapped individuals (ages 12-40), to increase the proportion of gestures used spontaneously. Results suggest that the teacher's nonresponding to high-rate spontaneous gesture requests increased individuals' use of previously taught but unused gesture requests. (Author/JDD)

Three individuals with multiple severe disabilities were taught an appropriate response to problem behaviors, but the response was less efficient than the problem behavior on physical effort, schedule of reinforcement, or stimulus-reinforcer time delay. The response did not compete successfully with the problem behaviors until a new, more…