Assessment and treatment of self-control with aversive events.

Self-control can be defined as choosing a smaller, immediate aversive event over a larger, delayed aversive event (e.g., flossing daily instead of risking major dental problems later). Children with developmental disabilities have been found to respond impulsively when given the choice between aversive events that differ based on magnitude and difficulty. However, qualitative differences between events may also impact aversiveness. This study attempted to replicate and extend prior research by (i) empirically identifying a hierarchy of qualitatively different aversive tasks for three individuals with developmental disabilities by evaluating their average latency to escape responses when presented with each task, (ii) assessing baseline levels of self-control (i.e., selection of immediate, low-aversive tasks over delayed, high-aversive tasks), and (iii) implementing an empirically validated treatment (i.e., adding a delay to both tasks). Each participant initially made impulsive choices, but self-control increased following treatment.

Evaluating different values of effort and reinforcement parameters under concurrent- and single-operant arrangements.

If particular parameters (e.g., reinforcer quality) are found to be preferred in a concurrent-operant arrangement, then these should be incorporated into interventions for maintaining skills in individuals with intellectual disabilities. However, because results from a concurrent-operant arrangement may not predict those of a single-operant assessment, interventions with less preferred parameters may also be effective. The purpose of this study was to determine if preference for a particular parameter, determined via concurrent-operant arrangements, predicted responding when two values of highly and less preferred parameters were manipulated in a single-operant arrangement. Participants allocated responding to one parameter over another during concurrent-operant assessments, indicating that certain parameters were highly preferred. However, contingent presentation of two values of less preferred parameters increased compliance to similar levels achieved with two highly preferred parameters in a single-operant arrangement. These findings suggest that clinicians may have multiple options when selecting parameters for use during intervention.

Effects of delay fading and signals on self-control choices by children.

The current study is a systematic replication and extension of work by Schweitzer & Sulzer-Azaroff (1988). The effects of delay fading alone and in combination with signals on choices between larger, delayed reinforcers and smaller, immediate reinforcers by four children with language deficits were examined. For one of the two children exposed to delay fading alone, larger reinforcers were selected at longer delays relative to the initial self-control assessment. For all four children, the delay-fading-plus-signal condition resulted in selection of larger reinforcers at considerably longer delays relative to the self-control assessment.

Effects of neutral and enthusiastic praise on the rate of discrimination acquisition.

Previous research has shown that praise is an effective reinforcer; however, few researchers have evaluated whether qualitative differences in praise affect responding. The purpose of the current study was to compare the effects of neutral, enthusiastic, and no praise on the rate of matching-to-sample acquisition during discrete-trial training with adults diagnosed with autism and an intellectual disability. In addition, we evaluated preference for neutral, enthusiastic, and no praise. All three participants acquired responses slightly faster during the enthusiastic praise condition. Preference assessment results showed that one participant preferred enthusiastic praise, whereas the two other participants showed indiscriminate selections.

An Evaluation of the Effects of a Mild Delayed Verbal Punisher on Choice of an Immediate Reinforcer by Children With Autism.

Different combinations of immediate and delayed consequences differentially affect choice. Basic research has found that nonhuman animals are more likely to choose an alternative that produces an immediate reinforcer that is followed by a delayed punisher as the delay to punishment increases. The purpose of the current effort was to examine the choices of three individuals with autism when they were given the choice between receiving a larger amount of preferred food followed by a mild, delayed verbal punisher and a smaller amount of the preferred food. A secondary purpose was to determine whether signal presence and duration would affect the efficacy of the punisher (i.e., whether children would be more likely to select the smaller reward that was not followed by a delayed punisher). Results were idiosyncratic across children and highlight the need to evaluate choice under multiple arrangements.

The ABCs of incentive-based treatment in health care: a behavior analytic framework to inform research and practice.

Behavior plays an important role in health promotion. Exercise, smoking cessation, medication adherence, and other healthy behavior can help prevent, or even treat, some diseases. Consequently, interventions that promote healthy behavior have become increasingly common in health care settings. Many of these interventions award incentives contingent upon preventive health-related behavior. Incentive-based interventions vary considerably along several dimensions, including who is targeted in the intervention, which behavior is targeted, and what type of incentive is used. More research on the quantitative and qualitative features of many of these variables is still needed to inform treatment. However, extensive literature on basic and applied behavior analytic research is currently available to help guide the study and practice of incentive-based treatment in health care. In this integrated review, we discuss how behavior analytic research and theory can help treatment providers design and implement incentive-based interventions that promote healthy behavior.

An evaluation of factors that influence children's instruction following.

Behavior that resembles instruction following might sometimes be under stimulus control of extraneous variables. We evaluated the effects of some of these variables (i.e., presence of relevant objects, associations between instructions and object sets) with 3 children with intellectual disabilities. In Experiment 1, we assessed whether subjects were more likely to follow instructions that required object manipulation and whether subjects were more likely to follow these instructions when only relevant objects were present. All subjects were more likely to follow instructions that required object manipulation when only relevant objects were present. In Experiment 2, we evaluated whether instruction following would be less likely if the same object set was associated with multiple instructions, and found this to be the case for 2 of 2 subjects. Findings highlight the need to train instruction following under different conditions to ensure that responding comes under stimulus control of the instructions.

Discrimination acquisition in children with developmental disabilities under immediate and delayed reinforcement.

We evaluated the discrimination acquisition of individuals with developmental disabilities under immediate and delayed reinforcement. In Experiment 1, discrimination between two alternatives was examined when reinforcement was immediate or delayed by 20 s, 30 s, or 40 s. In Experiment 2, discrimination between 2 alternatives was compared across an immediate reinforcement condition and a delayed reinforcement condition in which subjects could respond during the delay. In Experiment 3, discrimination among 4 alternatives was compared across immediate and delayed reinforcement. In Experiment 4, discrimination between 2 alternatives was examined when reinforcement was immediate and 0-s or 30-s intertrial intervals (ITI) were programmed. For most subjects, discrimination acquisition occurred under immediate reinforcement. However, for some subjects, introducing delays slowed or prevented discrimination acquisition under some conditions. Results from Experiment 4 suggest that longer ITIs cannot account for the lack of discrimination under delayed reinforcement.

Fixed-time schedule effects in combination with response-dependent schedules.

We evaluated the effects of fixed-interval (FI), fixed-time (FT), and conjoint (combined) FI FT reinforcement schedules on the responding of 3 adults who had been diagnosed with schizophrenia. Responding on vocational tasks decreased for 2 of 3 participants under FT alone relative to FI alone. Responding under FI FT resulted in response persistence for 2 of 3 participants. Results have implications for the maintenance of desirable behavior, as well as for situations in which FT treatment has been implemented for problem behavior and problem behavior is nevertheless reinforced by caregivers.

Parametric analysis of presession exposure to edible and nonedible stimuli.

We assessed the effects of individually defined small, medium, and large periods of presession access to edible and nonedible reinforcers on response rates during sessions in which responding produced access to identical reinforcers. Any presession access to an edible reinforcer decreased response rates for 1 participant, and small and medium periods of presession access to nonedible reinforcers resulted in similar or increased response rates for 2 participants.

Evaluation of absolute and relative reinforcer value using progressive-ratio schedules.

We evaluated behavior exhibited by individuals with developmental disabilities using progressive-ratio (PR) schedules. High- and low-preference stimuli were determined based on the results of a paired-stimulus preference assessment and were evaluated in subsequent reinforcer and PR assessments using concurrent and single schedules of presentation. In Experiment 1, results showed that for 2 of 3 participants, stimuli determined to be low-preference functioned as reinforcers when evaluated independent of high-preference stimuli. Further, the results from Experiment 2 showed that low-preference stimuli also functioned as reinforcers under gradually increasing PR requirements. Results suggest that for cases in which a high-preference stimulus is unavailable or impractical, the contingent delivery of relatively less preferred stimuli may maintain appropriate behavior, even as schedule requirements increase.