An evaluation of delay to reinforcement and mand variability during functional communication training.

Children with autism spectrum disorder and other developmental disabilities often exhibit invariant responding (i.e., restricted behavioral repertoires), deficits in communication, and challenging behavior. Approaches demonstrated in the basic and applied literature to increase response variability include extinction, lag schedules of reinforcement, and percentile schedules of reinforcement. Results of basic studies have also indicated that delays to reinforcement often produce increases in response variability. The purpose of the current study was to evaluate the effects of a delay to reinforcement on the variability of communication responses during functional communication training with individuals with developmental disabilities and histories of engaging in challenging behavior. Results indicated that delays to reinforcement increased mand variability with all four participants with variable effects on challenging behavior across participants.

Lag Schedules and Functional Communication Training: Persistence of Mands and Relapse of Problem Behavior.

We evaluated the effects of lag schedules of reinforcement and functional communication training (FCT) on mand variability and problem behavior in two children with autism spectrum disorder. Specifically, we implemented FCT with increasing lag schedules and compared its effects on problem behavior with baseline conditions. The results showed that both participants exhibited low rates of problem behavior during treatment relative to baseline during and following schedule thinning (up to a Lag 5 schedule arrangement). Variable and total mands remained high during schedule thinning. With one participant, variable manding persisted when the value of the lag schedule was reduced to zero. The current results are discussed in terms of implications for training multiple mand topographies during FCT for the potential prevention and/or mitigation of clinical relapse during challenges to treatment.

Further evaluation of latency-based brief functional analysis methods: An evaluation of treatment utility.

OBJECTIVE: Objectives were to evaluate latency-based brief functional analysis (BFA) model for identifying functions of aberrant behavior and treatments generated based on the results of the latency-based brief functional analysis. METHODS: We conducted latency-based BFA, including contingency reversals, and function-based treatment evaluations, including non-contingent reinforcement (NCR) and differential reinforcement of alternative behavior (DRA) with three individuals with autism using single subject design methodology. RESULTS: Socially-mediated functions (attention; tangible) were indicated for two participants and an automatic function was identified for one participant. The treatments generated based on results of the BFA were effective at reducing aberrant behavior for all participants. CONCLUSIONS: Results provide additional support that latency-based BFA model has utility in (a) the identification of functions of aberrant behavior and (b) the generation of function-based treatments. These results suggest clinicians who encounter setting and client-specific constraints (e.g. time; severity of aberrant behavior) have additional flexibility in choosing assessment tools.