A demonstration of incorporating discriminative stimuli into an AAC device during functional communication training.

Functional communication training (FCT) is an effective intervention for teaching communication responses and reducing challenging behavior. One limitation of FCT is that frequent reinforcement may be impractical or impossible in many situations. Recently, Mitteer et al. published a tutorial in the journal AAC that provided video models on how to implement an empirically supported strategy for thinning reinforcement during FCT, known as FCT with discriminative stimuli, when teaching with an augmentative and alternative communication (AAC) device. However, no study has empirically evaluated the approach described in that tutorial. This paper details a case study using several single-case experimental designs to teach a non-vocal autistic adult who did not use speech to communicate requests only when reinforcement was signaled to be available by the color of the AAC icons. We demonstrated the efficacy of this approach with unique pairs of discriminative stimuli for tangible and edible items, thinning reinforcement for each stimulus class independently. We then rapidly transferred stimulus control to new icons and integrated both classes of stimuli into a single AAC grid. This first demonstration of embedding discriminative stimuli into an AAC device represents a promising advancement for individuals who do not use speech and may not readily respond to delay or denial cues.

A Brief Review of Expanded-Operant Treatments for Mitigating Resurgence.

Resurgence following expanded-operant treatments (i.e., increasing the number or variability of alternative responses to problem behavior) has been the focus of numerous studies over the last five years. Researchers have evaluated several techniques for expanding the operant such as serial-, lag-, and concurrent-training procedures. Given the increasing number of recent studies on the topic, the various forms of training used, and the variability in outcomes, it is critical to review this area of research and identify clear future directions. Our brief review identified 10 published studies and eight unpublished theses or dissertations on this topic; however, only three published studies directly evaluated expanded-operant treatments as a strategy for relapse mitigation. All three studies evaluated serial-training procedures, and results across the studies were inconsistent. We summarize the findings of each study and provide recommendations for future research.

Incorporating discriminative stimuli into functional communication training with augmentative and alternative communication devices: a tutorial.

Functional communication training (FCT) is a commonly used and effective treatment for problem behavior maintained by social reinforcement (e.g., an individual engages in self-injurious behavior to gain access to adult attention). FCT involves teaching an individual to emit an appropriate communication response to access the reinforcer maintaining problem behavior (e.g., pressing a "Play, please" symbol on a device to gain the communication partner's attention) and withholding that reinforcer following problem behavior (e.g., the communication partner minimizes attention-following problem behavior and waits for a communication response). Techniques such as incorporating discriminative stimuli (e.g., differently colored cards) can make FCT more practical for caregivers by teaching individuals when reinforcement is and is not available for communication responses while simultaneously mitigating treatment relapse. Despite the effectiveness of FCT with discriminative stimuli, no studies have leveraged the capabilities of augmentative and alternative communication (AAC) devices by embedding discriminative stimuli within AAC software (e.g., by coloring communication symbols or grids). Our tutorial provides a comprehensive overview of how practitioners can incorporate FCT with discriminative stimuli into practice and includes video models of how to design these treatments on two common AAC apps.

Behavioral Momentum Theory: a Tutorial on Response Persistence.

Behavioral momentum theory (BMT) provides an integrative framework for evaluating the strength of a response when it contacts a disruptor, such as the discontinuation of reinforcement (i.e., extinction). Grounded in Newtonian physics, BMT distinguishes response rate (behavioral velocity) from response strength or persistence (behavioral mass). Behavioral velocity is affected by response-reinforcer contingencies, whereas behavioral mass is affected by stimulus-reinforcer contingencies (Nevin and Wacker 2013). We describe the determiners of behavioral mass, as well as common sources of disruption that are used to measure behavioral mass. Learning activities are embedded throughout this discussion to help readers better understand BMT and its implications for practice across a range of contexts.

The Munroe-Meyer Approach: Continuous Integration of Didactic Instruction, Research, and Clinical Practice.

Increased demand for applied behavior analysis (ABA) services has increased the need for additional masters-level practitioners and doctoral-level academicians and clinical directors. Based on these needs, the University of Nebraska Medical Center's (UNMC) Munroe-Meyer Institute has developed a PhD program. The academic structure at UNMC allowed us to create our PhD program in a relatively quick and efficient manner. Our PhD program has many unique features, including (a) close integration of didactic instruction with clinical and research training provided by leading experts in ABA in which students immediately apply concepts introduced in the classroom during coordinated clinical and research practica; (b) structured grant writing training in which students learn to write and submit an NIH-level grant;

Relative preference for distinct reinforcers maintaining destructive behavior.

The literature offers few recommendations for sequencing exposure to treatment conditions with individuals with multiply maintained destructive behavior. Identifying relative preference for the functional reinforcers maintaining destructive behavior may be one means of guiding that decision. The present study presents a preliminary attempt at developing a robust relative preference and reinforcer assessment for individuals with multiply maintained destructive behavior. Guided and free-choice trials were implemented in which participants chose between two multiple-schedule arrangements, each of which programmed signaled periods of isolated reinforcer availability and unavailability. Consistent participant choice and responding during free-choice trials was then used to thin the corresponding schedule of reinforcement. The results demonstrated a strong preference for one of the two functional reinforcers for all four participants, yet preferences differed across participants and were not well predicted by responding in prior analyses.

Resurgence Following Higher or Lower Quality Alternative Reinforcement.

Resurgence is a temporary increase in a previously suppressed target behavior following a worsening in reinforcement conditions. Previous studies have examined how higher rates or magnitudes of alternative reinforcement affect suppression of the target behavior and subsequent resurgence. However, there has been no investigation of the effects of higher versus lower qualities of alternative reinforcement on resurgence. Using a three-phase resurgence preparation with rats, the present experiments examined the effects of an alternative reinforcer that was of higher (Experiment 1) or lower (Experiment 2) quality than the reinforcer that had previously maintained the target behavior. The results of both experiments showed greater reductions in target behavior with a higher quality alternative reinforcer and larger increases in target responding when a higher quality alternative reinforcer was removed. Along with prior findings with higher rates and magnitudes of alternative reinforcement, these findings suggest that variations in reinforcer dimensions that increase the efficacy of alternative reinforcement also tend to increase resurgence when alternative reinforcement is removed. The results are discussed in terms of the resurgence as choice in context model and in terms of potential clinical implications.

Resurgence of destructive behavior following decreases in alternative reinforcement: A prospective analysis.

Basic and retrospective translational research has shown that the magnitude of resurgence is determined by the size of the decrease in alternative reinforcement, with larger decreases producing more resurgence. However, this finding has not been evaluated prospectively with a clinical population. In Experiment 1, five participants experienced a fixed progression of reinforcement schedule-thinning steps during treatment of their destructive behavior. Resurgence occurred infrequently across steps and participants, and when resurgence did occur, its clinical meaningfulness was often minimal. In Experiment 2, five new participants experienced these same schedule-thinning steps but in a counterbalanced order. Resurgence occurred most often and was generally largest with larger decreases in alternative reinforcement programmed earlier in the evaluation. Large decreases in alternative reinforcement may be more problematic clinically when they occur earlier in treatment. Whether larger transitions can be recommended in the clinic following the success of smaller ones will require additional research.

Barriers to Accessing Effective Treatments for Destructive Behavior.

The field of applied behavior analysis has developed and refined a comprehensive methodology for the assessment and successful treatment of destructive behavior: An individualized approach emphasizes (a) function of responding (or its cause) over its form; (b) objective and reliable measurement of behavior; (c) systematic procedures and their application; (d) rigorous, single-case experimental designs; and (e) determinations of successful intervention judged by improvements in the same individual's performance. Outcomes of this approach are often dramatic and reliably surpass those obtained by alternative means. However, significant barriers limit the accessibility of this proven therapy. Too few intensive behavioral intervention units, diagnosis- and age-dependent insurance authorization and reimbursement practices, long waitlists and slow approval processes, and the possibility of treatment relapse represent a few such barriers. This article describes these barriers and suggests some potential solutions.

Translational evaluation of on/off alternative reinforcement cycling.

Cycling between the availability and unavailability of reinforcement for alternative responding has successfully reduced resurgence in basic laboratory evaluations, but this approach represents a marked departure from current standards of care when treating problem behavior, warranting careful translation before its use clinically. Therefore, with extinction arranged for target responding across groups in Phase 2, we evaluated the effects of cycling between the availability and unavailability of differential reinforcement of alternative behavior (DRA) using a computer-based task with adult humans recruited through Amazon MTurk. Two control groups experienced constant DRA in Phase 2, with one group experiencing a dense DRA schedule and another group experiencing a lean DRA schedule. The cycling DRA group tended to show greater reductions in target responding and improved discrimination in Phase 2 and less target responding across Phases 2 and 3 than the lean DRA and dense DRA groups. These preliminary findings suggest that on/off DRA cycling procedures may produce more desirable treatment outcomes than constant DRA without producing negative side effects; however, further research is needed to confirm these possibilities.

Evaluations of heart rate during functional analyses of destructive behavior.

Previous research has examined the predictive validity of heart rate on destructive behavior; however, such research has yet to improve clinical practice or enhance our understanding of the relation between physiology and destructive behavior. The purpose of this study was to examine the predictive validity of heart rate on varying topographies and functions of destructive behavior while controlling antecedent and consequent events through functional analysis. We first demonstrated the reliability of the Polar H10 heart rate monitor and assessed the feasibility of its use in simulated functional analysis sessions. However, across four consecutively enrolled patients, heart rate was not found to be a reliable predictor of destructive behavior, regardless of its topography or function. Instead, functional reinforcer presence and absence was sufficient to predict socially reinforced destructive behavior. This study may provide a framework for the future assessment of other biological measures in relation to destructive behavior occurrence and nonoccurrence.

Additional Comments on the Use of Contingent Electric Skin Shock.

Prior to the ABAI member vote to decide between two alternative position statements on contingent electric skin shock (CESS), the current authors helped draft a consensus statement supporting the abolition of CESS. In this commentary, we provide additional, supporting information for that consensus statement by (1) showing that the extant literature does not support the supposition that CESS is more efficacious than less-intrusive interventions; (2) providing data showing that implementing interventions that are less intrusive than CESS does not lead to overreliance on the use of physical or mechanical restraint to control destructive behavior; and (3) discussing the ethical and public relations issues that arise when behavior analysts use painful skin shock to reduce destructive behavior in persons with autism or intellectual disability.

Basic and applied research on extinction bursts.

Discontinuation of the contingency between a response and its reinforcer sometimes produces a temporary increase in the response before its rate decreases, a phenomenon called the extinction burst. Prior clinical and basic studies on the prevalence of the extinction burst provide highly disparate estimates. Existing theories on the extinction burst fail to account for the dynamic nature of this phenomenon, and the basic behavioral processes that control response bursting remain poorly understood. In this paper, we first review the basic and applied literature on the extinction burst. We then describe a recent refinement of the concatenated matching law called the temporally weighted matching law that appears to resolve the above-mentioned issues regarding the extinction burst. We present illustrative translational data based conceptually on the model. Finally, we discuss specific recommendations derived from the temporally weighted matching law regarding procedures clinicians could implement to potentially mitigate or prevent extinction bursts.

Relapse and its mitigation: Toward behavioral inoculation.

Relapse following the successful treatment of problem behavior can increase the likelihood of injury and the need for more intensive care. Current research offers some predictions of how treatment procedures may contribute to relapse, and conversely, how the risk of relapse can be mitigated. This review describes relapse-mitigation procedures with varying levels of support, the quantitative models that have influenced the research on relapse mitigation, different experimental methods for measuring relapse mitigation, and directions for future research. We propose that by viewing the implementation of relapse-mitigation procedures as a means of producing behavioral inoculation, clinicians are placed in the proactive and intentional role of exposing their client's behavior to an array of reinforcement and stimulus conditions during treatment with the goal of decreasing the detrimental impact of future treatment challenges.

Further evaluation of treatment duration on the resurgence of destructive behavior.

Translation of promising procedures for mitigating treatment relapse has received considerable attention recently from researchers across the basic-applied continuum. One procedure that has demonstrated mixed support involves increasing the duration of treatment as a strategy for blunting resurgence. In a recent translational study, Greer et al. (2020) failed to detect a mitigation effect of increased treatment duration on the resurgence of destructive behavior. However, design limitations may have been responsible. The present study corrected these limitations by (a) employing a sequential design to decrease the possibility of multiple-treatment interference, (b) evaluating more treatment durations, (c) arranging treatments of fixed durations, and (d) conducting treatments of more extreme duration in a different clinical sample. Despite these improvements in experimental rigor and the testing of more extreme boundary conditions, the present study also failed to detect a mitigation effect of increased treatment duration. Likely explanations are discussed.

Resurgence of destructive behavior following differential rates of alternative reinforcement.

Behavioral momentum theory (BMT) suggests that resurgence of destructive behavior may be at least partly determined by the rate of alternative reinforcement, with lean schedules of reinforcement producing less resurgence than dense schedules. Findings from basic and translational studies have been mixed, and the effects of alternative reinforcement rate on resurgence remain unclear. In the current study, we conducted a within-subject evaluation of resurgence during extinction with four children following functional communication training using dense and lean (BMT-informed) schedules of alternative reinforcement. We observed no reliable differences in resurgence across the dense and lean conditions. We discuss implications of these findings in relation to future research using quantitative analyses to evaluate the relative effects of alternative reinforcement rate and other BMT-based strategies for mitigating resurgence in applied settings.

Validating Human-Operant Software: A Case Example.

Human-operant experiments conducted with computer software facilitate translational research by assessing the generality of basic research findings and exploring previously untested predictions about behavior in a cost-effective and efficient manner. However, previous human-operant research with computer-based tasks has included little or no description of rigorous validation procedures for the experimental apparatus (i.e., the software used in the experiment). This omission, combined with a general lack of guidance regarding how to thoroughly validate experimental software, introduces the possibility that nascent researchers may insufficiently validate their computer-based apparatus. In this paper, we provide a case example to demonstrate the rigor required to validate experimental software by describing the procedures we used to validate the apparatus reported by Smith and Greer (2021) to assess relapse via a crowdsourcing platform. The validation procedures identified several issues with early iterations of the software, demonstrating how failing to validate human-operant software can introduce confounds into similar experiments. We describe our validation procedures in detail so that others exploring similar computer-based research may have an exemplar for the rigorous testing needed to validate computer software to ensure precision and reliability in computer-based, human-operant experiments.

Phase duration and resurgence.

Resurgence, the recurrence of responding due to a worsening of reinforcement conditions for current behavior, is a prevalent form of treatment relapse. Resurgence as Choice in Context predicts that increasing the duration of exposure to reinforcement for target responding during Phase 1 will increase resurgence magnitude, whereas increasing the duration of exposure to reinforcement for alternative responding and extinction for target responding during Phase 2 will decrease resurgence magnitude. We conducted an experiment evaluating these predictions with human participants recruited through Amazon's Mechanical Turk platform. We varied Phase 1 and Phase 2 durations across 4 experimental groups. Resurgence as Choice in Context successfully predicted the differences in resurgence magnitude across these groups, and fitting the quantitative model to the obtained data yielded an exceptional coefficient of determination. We discuss the implications of these results for using Resurgence as Choice in Context to inform experiments with human participants and the feasibility of using human-operant preparations to evaluate resurgence.

Using GraphPad Prism's Heat Maps for Efficient, Fine-Grained Analyses of Single-Case Data.

Behavior analysts sometimes consider various forms of data analysis when making clinical decisions and when attempting to illuminate interesting relations in existing datasets. For example, an ongoing plot of when problem behavior occurs across days and times can yield useful information regarding the function(s) of problem behavior. In a post-hoc analysis, a plot of within-session error patterns can reveal which variables may be contributing to faulty stimulus control. Such analyses can be burdensome to conduct manually (e.g., changing the color of individual data points based on error type), and more efficient methods (e.g., using conditional formatting in Microsoft Excel data tables) might not be conducive for producing publication-quality figures. In the present article, we provide an overview of how behavior analysts can use GraphPad Prism's heat-map feature to efficiently populate fine-grained graphs of behavior with data points that are coded automatically (e.g., with categorical colors or gradients). Implications for clinical utility and research production are discussed.

Erratum: Publisher Correction to: Using GraphPad Prism's Heat Maps for Efcient, Fine-Grained Analyses of Single-Case Data.

[This corrects the article DOI: 10.1007/s40617-021-00664-7.].