Using Risk Ratios to Quantify Potential Behavior-Environment Relations.

Behavior-environment functional relations are the units of explanation in applied behavior analysis (ABA). Whether hypothesized experimentally or descriptively, quantification of putative functional relations improves our ability to predict and influence behavior. Risk ratios are an accessible, straightforward quantitative analysis that can serve this purpose. They have been employed to great effect in other fields (e.g., medicine, public health), but are rarely used within ABA. In this tutorial, we describe risk ratios and how they are calculated, discuss why risk ratios are well suited for quantifying behavior-environment relations, and illustrate their utility and applicability across five demonstrations from real clinical cases. Recommendations for the use of risk ratios in research and practice are discussed.

A Continuum of Methods for Assessing Preference for Conversation Topics.

Among individuals with a diagnosis of autism spectrum disorders (ASD), conversation topic preference could influence social skills in many ways. For example, an individual with advanced vocal-verbal skills, but just learning to join a conversation, might be less inclined to participate if the topic chosen is not preferred. However, commonly used preference assessment procedures have not been applied to evaluating conversation-topic preferences. Therefore, the purpose of the current experiment was to conduct three different types of assessments that varied in efficiency, the degree of certainty they allow, and clients with whom they are likely to be applicable and acceptable. In particular, we conducted a self-report preference assessment, a multiple-stimulus-without-replacement (MSWO) preference assessment, and a response restriction conversation assessment (RRCA). Each assessment identified a preferred topic of conversation, but the RRCA was the only assessment that was able to differentiate which topics would maintain a conversation. Implications for assessment and intervention procedures related to complex social skills are discussed and directions for future research are proposed.

Secondary and within-session analyses to improve the feasibility and precision of assessments of sociability.

Previous research has improved the feasibility and precision of assessments of sociability, but further progress is warranted. The purpose of this study was to evaluate secondary measures and within-session analyses to further improve the feasibility and precision of assessments of sociability. We reanalyzed previously published assessment results to evaluate whether initial and conditional (i.e., on therapist movement) approach and avoidance may approximate established continuous measures. Results indicated that both measures were strongly correlated with the percentage of session on the social side and may provide a more feasible approximation for use in clinical practice. We also conducted within-session analyses of these assessment results to evaluate whether they may improve precision or clarity. Correlational and matching-based analyses of the within-session data suggest that clear conclusions may be drawn from the results of a single session and facilitate a richer understanding of sociability. Implications for clinical practice and future research are discussed.

Applying the evolutionary theory of behavior dynamics to model the subtypes of automatically reinforced self-injurious behavior.

The delineation of the subtypes of automatically reinforced self-injurious behavior improved the utility of functional analysis results in predicting treatment efficacy. However, the mechanisms underlying subtype differences remain unclear and difficult to study in clinical populations. Morris and McDowell (2021) attempted to elucidate subtype differences by developing and evaluating models of the subtypes within the evolutionary theory of behavior dynamics. In the current study, we applied techniques from precision medicine to further evaluate the models developed by Morris and McDowell. This evaluation highlighted shortcomings of the existing models and suggested ways they could be improved. Thus, we conducted more extended modeling within the framework of precision medicine to identify models that were more quantitatively similar to available clinical data. Improved models that more closely approximate clinical data were identified. The implications of these models for research, practice, and further applications of the evolutionary theory of behavior dynamics are discussed.

A review of methods of assessing preference for social stimuli.

Research on preference and reinforcer assessments has historically focused on the evaluation of edible and leisure reinforcers, but the identification and use of individualized social reinforcers may be beneficial for several reasons. Recently, many studies have evaluated methods of assessing preference for social stimuli. The procedures and outcomes across these studies have varied greatly, and the current state of evidence for methods of assessing preference for social stimuli remains unclear. Thus, we conducted a review to synthesize all previous research in this area, evaluate the evidence for the utility of this general methodology, and identify factors that may influence its utility. Our results suggest that social preference assessments are likely to produce results that correspond with reinforcer assessment hierarchies. Preference assessment modality was one factor that influenced utility; video-based preference assessments had greater correspondence with reinforcer assessments than did other modalities. Directions for future research and implications for the use of social preference assessments in research and practices are discussed.

An evaluation of methods for studying the effects of conditioned reinforcement on human choice.

Shahan et al. (2006) found that the relative rate of pigeons' pecking on two observing responses (i.e., responses that only produced an S+ or stimulus correlated with primary reinforcement) was well described by the relative rate of S+ delivery. Researchers have not evaluated the effects of S+ delivery rate in a concurrent observing response procedure with human subjects, so the necessary procedural modifications for studying the effects of conditioned reinforcement on human choice remain unclear. The purpose of the current study was to conduct an additive component analysis of modifications to the procedures of Shahan et al. (2006). We evaluated the additive effects of introducing response cost, a changeover response, and ordinal discriminative stimuli on correspondence with the results of Shahan et al. and the quality of fits of the generalized matching equation. When our procedures were most similar to those of Shahan et al., we observed low rates of observing and indifference between the two observing responses. For the group of subjects with whom all three additive components were included, we obtained the highest level of sensitivity to relative rate of S+ delivery, but the slope and R2 of our fits of the generalized matching equation were still much lower than those obtained by Shahan et al. Potential reasons for these discrepancies, methods of resolving them, and implications for future research are discussed.

A systematic review of the correspondence between descriptive assessment and functional analysis.

Clinicians report that they often rely on descriptive assessments when developing behavior-reduction plans despite literature suggesting that functional analysis is the most rigorous assessment method. Further, research comparing the outcomes of descriptive assessments and functional analyses is mixed, with some studies showing low correspondence and others showing high correspondence. Such persistent use of descriptive assessments suggests that they may yield useful information despite inconsistent correspondence with functional analyses. A more fine-grained analysis of the relation between descriptive assessments and functional analyses may elucidate variables affecting their utility. We conducted a review of 48 studies that included descriptive assessments and functional analyses and evaluated several measures of correspondence between each pair of assessments. Results indicated that descriptive assessments had exact correspondence with functional analyses in 50% of comparisons. Results also suggested that descriptive assessments were more likely to accurately identify and predict the absence of a function relative to the presence of a function and that structured descriptive assessments were more likely to accurately predict functions.

The matching law provides a quantitative description of social time allocation in children with autism.

Recent research has developed and evaluated assessments of sociability in which time allocation near or away from an adult who initiates social interactions is used to characterize the participant as social, indifferent, or avoidant of social interaction. Though these qualitative outcomes have been useful, no studies have evaluated methods of obtaining more quantitative measures of sociability. The matching law has been demonstrated to describe a wide range of human behavior and may also be useful in describing social time allocation. We adapted the matching law and assessment of sociability procedures with the aim of providing a more precise, quantitative measure of sociability. We fitted the matching equation to the social time allocation data of 8 children with autism spectrum disorder. The equation was effective in quantifying sociability, accounted for a large proportion of variance in participants' behavior, did so equally well for participants who were social and avoidant, and provided a more sensitive measure relative to those used in previous research. The implications of this methodology, its potential utility, and directions for future research are discussed.

Increasing social time allocation and concomitant effects on mands, item engagement, and rigid or repetitive behavior.

Recent research has developed methods of assessing the function of generic, nonindividualized social interactions. The purpose of this type of assessment is to provide a measure of how an individual may respond to the types of interactions readily available in the natural environment. To date, no research has evaluated how the social time allocation of individuals for whom generic interactions are neutral or aversive could be improved. Moreover, no research has included additional dependent variables that may be functionally related to social time allocation. In the current study, we evaluated the effects of initiating preferred, individualized social interactions on the social time allocation of 3 participants for whom generic interactions functioned as neutral or aversive stimuli. The intervention increased social time allocation for all 3 participants. Next, we evaluated the relation between social time allocation and the occurrence of mands, item engagement, and rigid or repetitive behavior using the intervention data as well as secondary analyses of previously published datasets. The occurrence of mands and rigid or repetitive behaviors changed with improvements in social time allocation and were strongly correlated with social time allocation across participants. Implications for future research on, and the clinical use of, this type of assessment and intervention are discussed.

Evaluating the function of social interaction for children with autism.

Several researchers have assessed whether or not social interaction is reinforcing; however, few studies have evaluated methods of assessing whether social interactions function as reinforcing, neutral, or aversive stimuli. We extend this research by evaluating a new method of assessing the function of social interaction. Twenty-one children diagnosed with Autism Spectrum Disorder (ASD) participated. Social interactions were found to function as reinforcers for 9 participants, neutral stimuli for 7 participants, and aversive stimuli for 5 participants. The method evaluated was found to be more efficient, may be more feasible, and was similarly as decisive as methods evaluated in previous research. Implications of this study and its methodology as well as future directions in this line of research are discussed.

Evaluating bowel movements, self-initiations, and problem behavior with the emergence of urinary continence.

Much of the research evaluating toilet training interventions for children with ASD has focused on urinations as the primary dependent variable. As a result, the effects that toilet training interventions targeting urinations may have on other related dependent variables remains unclear. We conducted a retrospective analysis of data obtained by Perez et al. (2020), who evaluated the effects of a treatment package on urinary continence in children with ASD. We examined the relation between the emergence of urinary continence and multiple nontargeted dependent variables: bowel movements, self-initiation correspondence, percentage of appropriate urinations that were self-initiated, self-initiation rate, and problem behavior. Results showed that improvements in urinary continence were strongly correlated with improvements in all nontargeted dependent variables. Implications for future research and clinical practice are discussed.

Comparing the results of one-session, two-session, and three-session MSWO preference assessments.

The multiple-stimulus-without-replacement (MSWO) preference assessment is commonly used in behavior-analytic research and practice. As originally published, the MSWO included 5 sessions in an effort to confirm stimulus preferences. Subsequent researchers have evaluated the validity of MSWO outcomes when the assessment is abbreviated. Generally, valid outcomes have been noted for 3-session MSWOs (that is, the outcomes match those of the 5-session version), while validity outcomes for 1- or 2-session MSWOs have varied across studies. The current study utilized data from 157 MSWO preference assessments conducted in previously published research with 49 total participants and analyzed the extent to which 1-session or 2-session variations of those assessments would have yielded similar outcomes as a 3-session assessment. Results indicate that the hierarchies produced by both abbreviated formats were strongly correlated with those produced by a 3-session assessment. However, neither 1- nor 2-session MSWOs reliably identified the same highest-preferred stimuli as a 3-session MSWO.

Identifying the relation between feedback preferences and performance.

Performance feedback is a common organizational behavior management intervention (Gravina et al., 2018) that typically yields consistent effects when combined with other procedures (Alvero et al., 2001). A noteworthy characteristic that might affect feedback effectiveness is timing (Lechermeier & Fassnacht, 2018). Given the frequent use and practical utility of feedback, we assessed feedback preference across three feedback timing options: after step, after trial, and after session. We used a direct-choice paradigm to assess feedback timing preferences with undergraduate students completing two multistep computerized tasks. The data obtained suggest that most participants shifted their preference from relatively proximal (e.g., after step) to distal feedback (e.g., after session) as they acquired the tasks. A few participants' preferences varied despite increases in performance. We discuss implications based on the current findings and future directions for research.

Evaluating skills correlated with discriminated responding in multiple schedule arrangements.

One potential solution for excessively high-rate functional communication responses (FCR) is to establish stimulus control of the FCR through a multiple schedule. However, several studies have demonstrated difficulty with establishing discriminated responding across multiple schedule components. The primary aim of the current study was to evaluate how participants' skills related to color discrimination may be related to the emergence of discriminated responding in a multiple schedule with colors as the schedule-correlated stimuli. Three secondary aims of the current study were to evaluate: a) varied multiple schedule arrangements, b) if topographically dissimilar stimuli facilitated the emergence of discriminated responding, and c) if employing different colored stimuli across multiple schedule arrangements reduced the likelihood that discriminated responding emerged simultaneously across varied arrangements. Nine participants' ability to match, select, tact, and respond intraverbally to colors was assessed, and 1 of 2 evaluations of multiple schedule arrangements were conducted. Results indicated that participants' ability to select and tact colors was strongly correlated with the efficacy of standard multiple schedule arrangements. Additionally, multiple schedule arrangements employing topographically dissimilar stimuli were observed to be equally as effective as standard arrangements and the inclusion of different colored stimuli across arrangements did not reduce the likelihood that discriminated responding emerged simultaneously across all conditions, when it was observed to emerge at all.

Modeling Subtypes of Automatically Reinforced Self-Injurious Behavior with the Evolutionary Theory of Behavior Dynamics.

The subtypes of automatically reinforced self-injurious behavior (ASIB) delineated by Hagopian and colleagues (Hagopian et al., 2015; 2017) demonstrated how functional-analysis (FA) outcomes may predict the efficacy of various treatments. However, the mechanisms underlying the different patterns of responding obtained during FAs and corresponding differences in treatment efficacy have remained unclear. A central cause of this lack of clarity is that some proposed mechanisms, such as differences in the reinforcing efficacy of the products of ASIB, are difficult to manipulate. One solution may be to model subtypes of ASIB using mathematical models of behavior in which all aspects of the behavior can be controlled. In the current study, we used the evolutionary theory of behavior dynamics (ETBD; McDowell, 2019) to model the subtypes of ASIB, evaluate predictions of treatment efficacy, and replicate recent research aiming to test explanations for subtype differences. Implications for future research related to ASIB are discussed.

Evaluating the function of social interaction using time allocation as a dependent measure: A replication and extension.

Call et al. (2013) described a method of assessing the function of social interactions that used time allocation as a dependent measure. The current study replicated the method described by Call et al. and evaluated several extensions aimed at increasing the feasibility and efficiency of the assessment and the utility of its results. Seven children diagnosed with Autism Spectrum Disorder (ASD) participated. Social interactions were concluded to be reinforcing for 5 participants and aversive for 2 partcipants. Time allocation data for all participants are presented as well as additional analyses related to patterns of switching toward or away from social contact and session duration. Implications of this study and its methodology as well as future directions in this line of research are discussed.

A comparison of methods for assessing preference for social interactions.

Researchers have evaluated a variety of methods for assessing preference for social interactions, and generally have found that such assessments accurately identify differentially reinforcing, preferred interactions. However, few researchers have compared methods for assessing preference for social interactions, and none have done so with participants across different skill levels. The current study compared the stability and validity of hierarchies produced by social interaction preference assessments (SIPA) and picture-based multiple stimulus without replacement preference assessments (MSWO) with 8 individuals diagnosed with autism spectrum disorder (ASD). The MSWO most often produced valid hierarchies for participants who could match, identify, and tact pictures of social interactions and that the SIPA most often produced valid hierarchies for participants who could not identify or tact pictures of social interactions. A vocal paired-stimulus preference assessment (PSPA) was also conducted with a subset of participants who communicated vocally, and it produced valid hierarchies. Considerations and recommendations for selecting a method of assessing preference for social interactions are discussed.

A comparison of picture and GIF-based preference assessments for social interaction.

Researchers have recently begun to evaluate video-based preference assessments; however, only two studies have evaluated the efficacy of this preference assessment modality in assessing preference for social interactions. Four individuals diagnosed with autism spectrum disorder who could not match pictures or graphic-interchange-format images (GIFs) of social interactions to in vivo interaction participated. We compared picture and GIF-based paired-stimulus preference assessments for social interaction and evaluated the preference assessment hierarchies by conducting a concurrent-operant reinforcer assessment including all social interactions. The GIF-based preference assessment produced similar hierarchies to the reinforcer assessment for all participants, whereas the picture-based preference assessments produced similar hierarchies to the reinforcer assessment for 2 of 4 subjects. Additionally, we conducted a modality preference assessment in which we evaluated participants' preference for viewing GIFs or pictures of social interactions, and found that 3 out of 4 subjects displayed a preference for GIFs.

Evaluating the stability, validity, and utility of hierarchies produced by the Social Interaction Preference Assessment.

Morris and Vollmer (2020) evaluated a novel method of assessing preference for social interaction, which they called the Social Interaction Preference Assessment (SIPA), and found it often produced hierarchies similar to a concurrent operant reinforcer assessment. We replicated and extended these findings. In study 1, we evaluated the stability of the SIPA hierarchies by conducting multiple SIPAs with 5 participants diagnosed with Autism Spectrum Disorder (ASD). In Study 2, we evaluated the validity and utility of these hierarchies by providing different social interactions as consequences for skill acquisition tasks with 3 participants from the first study. Varying degrees of stability in the SIPA hierarchies and a high level of correspondence between these hierarchies and rates of acquisition during the reinforcer assessment were observed. These findings and their implications are discussed.

Assessing preference for types of social interaction.

To date, few researchers have evaluated methods for assessing preference for social interactions. Due to concerns that commonly used stimulus preference assessment methods may be inappropriate, or at least cumbersome, for the assessment of social reinforcers, we developed and evaluated a new method of assessing preference for social interactions. A social interaction preference assessment (SIPA) and a concurrent operant reinforcer assessment were conducted with five participants diagnosed with autism spectrum disorder. A differentially preferred and reinforcing social interaction was identified for all five participants. The SIPA procedures, results, and the implications of these results are discussed.