Two studies involving three adolescents with severe emotional disturbance/behavior disorders and learning difficulties examined effects of problem difficulty and reinforcer quality upon time allocated to two sets of arithmetic problems. Results have implications for understanding the effects of problem difficulty and reinforcer quality on behavior…

A graduated guidance procedure was used to teach 4 boys (ages 9-14) with autism to follow photographic activity schedules to increase on-task and on-schedule behavior. Use of the schedules produced sustained engagement which generalized to a new schedule with a new sequence of photographs. Subjects were able to independently change activities in…

This study compared the effects of unequal and equal reinforcer duration during a functional analysis of aberrant behavior in an 11-year old with moderate mental retardation. Results showed that reinforcer duration affects the rate of aberrant behavior and may potentially alter functional analysis interpretation. (DB)

Using an ABAB design, two procedures for requesting a change of activity were compared for their effect on the stereotypic behavior of a man with autism. One procedure requested immediate change of activities, whereas the second procedure gave advance notice of a change. Less stereotypy occurred when advance notice of change was given. (Author/DB)

This study found that use of music as a reinforcer was highly effective in increasing productive and decreasing nonproductive behavior of 6 competitive swimmers (ages 12-16) during the dry-land portion of a practice session. Subjects rated the musical reinforcement favorably and elected to have the procedure continued. (Author/DB)

An intervention for noncompliance, consisting of a series of requests promoting a high probability of compliance followed either 5 seconds or 20 seconds later by a request with a low probability of compliance, was implemented with a preschool child with autism. Results indicated that a shorter interprompt time resulted in higher rates of…

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)

This study comparing momentary time sampling against the real time obtained with handheld computers confirmed laboratory findings that short-elementary time sampling estimates percentage time accurately for a wide range of behavior frequencies and durations, and suggested that observers using momentary time sampling in a natural setting are able…

Three adolescent students with special educational needs were given reinforcers (nickels) according to three different concurrent variable-interval schedules. Time allocated to the assigned tasks was in linear relationship to the reinforcement rate. However, changes in reinforcement schedules were not followed by changes in allocation patterns…

This study compared immediate (after each error) and delayed (at the end of each session) error correction during sight-word instruction with 4 students (ages 7-9) with developmental disabilities. Immediate error correction was superior on each of four dependent variables. (Author/DB)

The effects of a variable-ratio schedule of reinforcement on pedaling a stationary exercise bicycle were examined with 3 obese and 3 nonobese 11-year-old boys over a 12-week period. The intervention resulted in systematic increases in rate of exercise for all subjects. (Author/DB)

This case study describes initially unsuccessful attempts to use the delayed-cue procedure to teach conditional discriminations to a 25-year-old male with moderate mental retardation. The subject typically waited for the delayed cue unless differential responses to the dictated samples (repeating the sample names) were required. (Author/DB)

This study examined the effects of methylphenidate drug therapy and differential reinforcement on the disruptive behavior and task engagement of 3 children (ages 6 through 11) with mental retardation. Results indicated that both interventions were effective for two of the children. No evidence of an additive or synergistic effects of the two…

The first of two studies with two adolescent students with serious emotional disturbances examined the interaction between unequal rates of reinforcement and equal versus unequal delays to reinforcer access on performance of math problems. The second study examined the interactive effects of reinforcer rate, quality, and delay. (Author/DB)

Two elementary school students with emotional/behavioral challenges increased task engagement and reduced disruptive behavior when allowed to choose academic tasks. The effects of choice making were distinguished from preference, by yoking a no-choice phase to a previous choice-making condition; the yoked control phase was inferior to the…