This study examined the effects of three reinforcement histories on the persistence of task engagement by two students (ages 9-10) who were off task during independent seat work. Results found the reinforcement history that contained an instructional control component produced the greatest persistence in student engagement. (Author/CR)

Teachers of 2 children (ages 7 and 13) with autism were trained to conduct a descriptive analysis and a classroom experimental analysis of aberrant behavior. Each procedure identified negative reinforcement as a maintaining variable for aberrant behavior. Intervention based on the assessment was successfully implemented with one child and had…

Results of a functional analysis of self-injurious behavior (SIB) in a 7-year-old child with autism showed that her SIB was maintained by access to preferred object and escape or avoidance of task demands. Warning stimuli in combination with extinction and noncontingent reinforcement reduced SIB to acceptable levels. (Author/CR)

Method of treatment of self-injurious behaviors for three severely retarded students (ages six-seven) was selected by matching one of three hypotheses (self-stimulation, positive reinforcement, negative reinforcement) to a judgment concerning cause. Results supported the argument that treatment programs should be based on a functional analysis of…