In science in general and in the context of single-case experimental designs, replication of the effects of the intervention within and/or across participants or experiments is crucial for establishing causality and for assessing the generality of the intervention effect. Specific developments and proposals for assessing whether an effect has been…

This paper presents a method for distinguishing between extinction and punishment effects. In extinction and punishment, different schedules of reinforcement or punishment are in effect when a given proportion of responses is blocked. Response patterns in treatment of hand mouthing in an adult with profound mental retardation suggest that a…

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)

The self-injurious escape behavior of an adult with developmental disabilities was treated with extinction. Results of a reversal design showed substantial bursts of responding when extinction was introduced and reintroduced: self-injury remained at a variable and elevated rate for some time before stable, low rates were observed. (Author/DB)

This study analyzed specific stimuli reinforcing destructive behavior in two 11-year-olds males with mental retardation and severe destructive behavior problems maintained by attention. The use of concurrent schedules of reinforcement identified alternatives to the reinforcing verbal reprimands and led to development of effective treatments to…

Discussion of the functional relationship between self-injurious behavior (SIB) and self-restraint in people with severe disabilities considers SIB and self-restraint as members of the same functional response class, SIB and self-restraint as functionally independent responses, access to self-restraint as positive reinforcement of SIB, termination…

A fading procedure was successfully used to maintain high levels of compliance obtained with presenting high-probability requests immediately antecedent to low-probability requests in both a 5-year-old boy with developmental disabilities and a 15-year-old girl with developmental disabilities (for whom rephrasing of "don't" requests to…

This study, with an 11-year-old male with severe mental retardation, investigated the effectiveness of selectively implementing punishment for only the most severe topographies of aggression and property destruction, whereas less extreme behaviors were ignored. Results indicated that severe behaviors were reduced to near-zero levels only when both…

This paper summarizes brief functional assessments of 79 cases of people with developmental disabilities and self-injurious, aggressive, stereotypic, or other aberrant behavior. Outcomes were evaluated across three variables: (1) referring topography, (2) control over behavior, and (3) the identified maintaining conditions for aberrant behavior.…

Results of a functional analysis indicted that the hand mouthing of a woman with profound mental retardation was maintained by multiple sources of control (sensory stimulation and access to a leisure item). Hand mouthing, though maintained by automatic reinforcement, was also susceptible to social contingencies when exposed to them during…

This study evaluated self-control and impulsivity in two nine-year- old males with severe developmental disabilities and behavior disorders. Functional analyses suggested that aggression was reinforced by food access. A differential reinforcement procedure to reinforce appropriate mands was implemented. Although aggression occurred when it…