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Open science practices are designed to enhance the utility, integrity, and credibility of scientific research. This article highlights how preregistration in open science practice can be leveraged to enhance the rigor and transparency of single-case experimental designs within an applied behavior analysis framework. We provide an overview of the benefits of preregistration including increased transparency, reduced risk of researcher bias, and improved replicability, and we review the specific contexts under which these practices most benefit the proposed framework. We discuss potential concerns with and unique considerations for preregistering experiments that use single-case designs, with practical guidance for researchers who are seeking to preregister their studies. We present a checklist as a tool for researchers in applied behavior analysis to use for preregistration and provide recommendations for our field to strengthen the contingencies for open science practices that include preregistration.

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Multielement designs are the quintessential design tactic to evaluate outcomes of a functional analysis in applied behavior analysis. Protecting the credibility of the data collection, graphing, and visual analysis processes from a functional analysis increases the likelihood that optimal intervention decisions are made for individuals. Time-series graphs and visual analysis are the most prevalent method used to interpret functional analysis data. The current project included two principal aims. First, we tested whether the graphical construction manipulation of the x-to-y axes ratio (i.e., data points per x- axis to y-axis ratio [DPPXYR]) influenced visual analyst's detection of a function on 32 multielement design graphs displaying functional analyses. Second, we investigated the alignment between board certified behavior analysts (BCBAs; N = 59) visual analysis with the modified visual inspection criteria (Roane et al., Journal of Applied Behavior Analysis, 46, 130-146, 2013). We found that the crossed GLMM that included random slopes, random intercepts, and did not include an interaction effect (AIC = 1406.1, BIC = 1478.2) performed optimally. Second, alignment between BCBAs decisions and the MVI appeared to be low across data sets. We also leveraged current best practices in Open Science for raw data and analysis transparency.

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Tummy time is an activity for infants to practice their early motor skills. Although most pediatricians recommend tummy time, parents may avoid the procedures due to indices of infant discomfort during this period. This consecutive controlled case series evaluation compared the effects of preferred items selected from a preference assessment with those of parental attention on head evaluation and negative vocalizations during tummy time. In addition, we directly evaluated parental choice by inviting parents to select which tummy time treatment they wanted to implement. We found that both preferred items and parental attention effectively increased head elevation and decreased negative vocalizations during tummy time; however, parents tended to prefer the treatment that included the preferred item.

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Publication bias is an issue of great concern across a range of scientific fields. Although less documented in the behavior science fields, there is a need to explore viable methods for evaluating publication bias, in particular for studies based on single-case experimental design logic. Although publication bias is often detected by examining differences between meta-analytic effect sizes for published and grey studies, difficulties identifying the extent of grey studies within a particular research corpus present several challenges. We describe in this article several meta-analytic techniques for examining publication bias when published and grey literature are available as well as alternative meta-analytic techniques when grey literature is inaccessible. Although the majority of these methods have primarily been applied to meta-analyses of group design studies, our aim is to provide preliminary guidance for behavior scientists who might use or adapt these techniques for evaluating publication bias. We provide sample data sets and R scripts to follow along with the statistical analysis in hope that an increased understanding of publication bias and respective techniques will help researchers understand the extent to which it is a problem in behavior science research.

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LAY ABSTRACT: Functional communication training, an intervention for challenging behavior rooted in principles of applied behavior analysis, has copious empirical support dating back to the mid-1980s for autistic individuals. Recently, there has been a concerted effort to thin reinforcement delivery during functional communication training using contingency-based delays that, in turn, are designed to enhance practicality and feasibility while not compromising efficacy. In this synthesis, we meta-analyzed the literature base with the goal of investigating both combined and across type effectiveness of contingency-based delays. We also aimed to investigate moderating variables that might impact intervention outcomes. Findings showed that contingency-based delays were effective for individuals with an autism spectrum disorder diagnosis and most effective when the delay incorporated some form of positive reinforcement. In addition, differential reinforcement of alternative-based delays was overall more effective when compared to differential reinforcement of other behavior-based delays. Noteworthy moderating variables found to impact contingency-based delay efficacy included the intervention dosage and the topography of behavior. We discuss these findings and highlight directions where additional empirical research is warranted to improve our understanding about contingency-based delays for individuals diagnosed with autism spectrum disorder.

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In single-case research designs (SCDs) to determine a functional relation a time-series graph is constructed. Preliminary evidence suggest the approach used to scale the vertical axis and the data points per x- to y-axis ratio (DPPXYR) impact visual analysts' decisions. We conducted a systematic review to evaluate time-series graphs published in the last decade in four premier journals in the field of autism. We included 348 articles including 2675 graphs. We identified large variation across and within types of SCDs when evaluating the lengths of the vertical and horizontal axis using the y:x ratio and the DPPXYR, with few adhering to current recommendations. A majority of graphs used an appropriate method to scale the vertical axis that would not increase Type I error rates.

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Visual analysis is the primary method used to interpret single-case experimental design (SCED) data in applied behavior analysis. Research shows that agreement between visual analysts can be suboptimal at times. To address the inconsistent interpretations of SCED data, recent structured visual-analysis technological advancements have been developed. To assess the extent to which structured visual analysis is used to guide or supplement applied behavior analysts' interpretation of SCED graphs, a systematic review between the years of 2015 to 2020 in the Journal of Applied Behavior Analysis was conducted. Findings showed that despite recent efforts to develop structured visual-analysis tools and criteria, these methods are rarely used to analyze SCED data. An overview of structured visual-analysis tools is shared, their utility is delineated, common characteristics are brought to light, and future directions for both research and their clinical use are highlighted.

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For more than four decades, researchers have used meta-analyses to synthesize data from multiple experimental studies often to draw conclusions that are not supported by individual studies. More recently, single-case experimental design (SCED) researchers have adopted meta-analysis techniques to answer research questions with data gleaned from SCED experiments. Meta-analyses enable researchers to answer questions regarding intervention efficacy, generality, and condition boundaries. Here we discuss meta-analysis techniques, the rationale for their adaptation with SCED studies, and current indices used to quantify the effect of SCED data in applied behavior analysis.

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Individuals diagnosed with autism spectrum disorder (ASD) who engage in stereotypy may also emit a prior, temporally contiguous, high-risk response to access stereotypic behaviors. For example, the participant in this study who was diagnosed with ASD engaged in a chained response that included elopement, often in unsafe locations, to access light switch flipping. Previous research indicates that functional communication training (FCT) with delay fading is a viable approach to reduce chained problem behavior. In this study, we extended previous research by (a) evaluating the generalized effect of FCT and schedule thinning using multiple schedule technology for an automatically maintained chained response, and (b) evaluating whether intervention effects maintained in the participant's optimal context. Results for the participant suggested that FCT with schedule thinning mitigated high-risk chained responding across settings and discrimination training using a multiple schedule assessment effectively signaled available and unavailable times for the participant to emit the chained response which matched the participant's natural schedule parameters.

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: In their recent review, 'Psychological treatment strategies for challenging behaviours in neurodevelopmental disorders: what lies beyond a purely behavioural approach?' Woodcock and Blackwell discuss supposed deficiencies in applied behavior analysis (ABA) and positive behavior support (PBS) to address challenging behavior. This commentary highlights problems with Woodcock and Blackwell's critique based on substantial evidence that behavioral approaches including ABA and PBS are often the best available solution for individuals with neurodevelopmental disorders who display challenging behavior.

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As individuals with autism spectrum disorder (ASD) transition to adulthood, problem behavior may present restrictions to an independent lifestyle. In addition, problem behavior may interfere with performance of daily routines necessary for independent living. We developed a successful treatment for automatically reinforced toilet lid destruction of an adolescent with ASD during routine bathroom visits. The treatment was informed by a competing stimulus assessment (CSA) that identifies a preferred stimulus, the presentation of which is intended to compete with automatic reinforcement of problem behavior. Results indicated that access to the competing stimulus reduced the participant's toilet lid destruction while in the bathroom, and these treatment gains maintained during long term follow-up visits.

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Publication bias is the disproportionate representation of studies with large effects and statistically significant findings in the published research literature. If publication bias occurs in single-case research design studies on applied behavior-analytic (ABA) interventions, it can result in inflated estimates of ABA intervention effects. We conducted an empirical evaluation of publication bias on an evidence-based ABA intervention for children diagnosed with autism spectrum disorder, response interruption and redirection (RIRD). We determined effect size estimates for published and unpublished studies using 3 metrics, percentage of nonoverlapping data (PND), Hedges' g, and log response ratios (LRR). Omnibus effect size estimates across all 3 metrics were positive, supporting that RIRD is an effective treatment for reducing problem behavior maintained by nonsocial consequences. We observed larger PND for published compared to unpublished studies, small and nonsignificant differences in LRR for published compared to unpublished studies, and significant differences in Hedges' g for published compared to unpublished studies, with published studies showing slightly larger effect. We found little, if any, difference in methodological quality between published and unpublished studies. While RIRD appears to be an effective intervention for challenging behavior maintained by nonsocial consequences, our results reflect some degree of publication bias present in the RIRD research literature.

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Aquatic-based activities produce positive skill and health benefits for individuals with Autism Spectrum Disorder (ASD); however, aquatic contexts, such as the pool, introduce the risk of injury and drowning. This risk is heightened when individuals with ASD engage in challenging behavior in the pool context. The purpose of the study was to evaluate the effects of differential reinforcement without extinction for 2 participants diagnosed with ASD who engaged in challenging behavior when asked to transition from the pool. The treatment successfully decreased participants' transition latencies and challenging behavior during transitions from the pool for up to 2 months following treatment. Lifeguard staff rated the procedures as highly acceptable and helpful, and noted high degrees of satisfaction with improvements for each participant's behavior.

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This brief practice is an evaluation of work output predicted by Timberlake's (1980) disequilibrium model. Jacobs, Morford, King, and Hayes (2017) provided a downloadable, online tool using the disequilibrium model to assist practitioners in maximizing intervention outcomes. The disequilibrium model was used to predict the duration of independent seatwork for Marvin, a 17-year-old boy diagnosed with autism spectrum disorder. The disequilibrium model effectively predicted a work duration that Marvin was compliant with throughout the study. Practitioners should consider using the disequilibrium tool to select intervention parameters.

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Personal hygiene routines, such as nail cutting, are essential for maintaining good health. However, individuals with autism spectrum disorder (ASD) and other developmental disabilities often struggle to comply with essential, personal hygiene routines. We conducted a systematic replication of Schumacher and Rapp (2011), Shabani and Fisher (2006), and Bishop et al. (2013) to evaluate an intervention that did not require escape extinction for increasing compliance with nail cutting. With two adolescents diagnosed with ASD who resisted nail cutting, we evaluated the effects of delivering a preferred edible item contingent on compliance with nail cutting. Results indicated that the treatment reduced participants' escape responses and increased their compliance with nail cutting.

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