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Abstract Overlap is one of the data aspects that are expected to be assessed when visually inspecting single-case experimental designs (SCED) data. A frequently used quantification of overlap is the Nonoverlap of All Pairs (NAP). The current article reviews the main strengths and challenges when using this index, as compared to other nonoverlap indices such as Tau and the Percentage of data points exceeding the median. Four challenges are reviewed: the difficulty in representing NAP graphically, the presence of a ceiling effect, the disregard of trend, and the limitations in using p -values associated with NAP. Given the importance of complementing quantitative analysis and visual inspection of graphed data, straightforward quantifications and new graphical elements for the time-series plot are proposed as options for addressing the first three challenges. The suggestions for graphical representations (representing within-phase monotonic trend and across-phases overlaps) and additional numerical summaries (quantifying the degree of separation in case of complete nonoverlap or the proportion of data points in the overlap zone) are illustrated with two multiple-baseline data sets. To make it easier to obtain the plots and quantifications, the recommendations are implemented in a freely available user-friendly website. Educational researchers can use this article to inform their use and application of NAP to meaningfully interpret this quantification in the context of SCEDs.

AbstractDifferent personal information types are shared at different rates during a social‐discounting task. However, it is unclear whether differences in social‐discounting rates between different personal information types are related to differences in valuing personal information. To assess the value of personal information more directly, 160 university student participants completed four hypothetical purchase tasks (HPT) for protecting identification, health, security, and financial personal information at 17 ascending price points and a social‐discounting task for one of those four different personal information types. The results for social discounting partially replicated those of a previous study where discounting rates for health information were higher than those for financial information. The results for the HPT largely mirrored those for the social‐discounting task. The demand for protecting financial information was significantly higher relative to the that for the other three types of personal information for most demand indices such as the highest price participants were willing to pay for the protection of personal information (break point) and the price where consumption for personal information protection became elastic (Pmax). However, there were no significant relations between social‐discounting rate and HPT demand indices. These results show that value may play a role in the observed differences in social‐discounting rate for personal information, but additional factors likely contribute to these differences.

AbstractEfficient methods for assessing the relative aversiveness of stimuli are sparse and underresearched. Having access to efficient procedures that can identify aversive stimuli would benefit researchers and practitioners alike. Across three experiments, 13 participants helped to pilot, refine, and test two approaches to identifying negative reinforcers. The first experiment presented two conditions, one in which computerized button pressing started or stopped one of two recorded infant cries (or silence, when the control button was selected). Choices were presented either in a modified observing‐response procedure (i.e., simultaneous observing) or in a modified progressive‐ratio procedure (i.e., committed concurrent progressive ratio; CCPR). Results were favorable though not conclusive on their own. A second experiment, using more distinct stimuli (i.e., one likely aversive, one likely not aversive), replicated the first, and clearer results emerged. Finally, the third experiment tested the stimuli from the second experiment in a CCPR arrangement where sound was terminated contingent on responding and idiosyncratic negative reinforcement hierarchies emerged. The utility of these two procedures is discussed, and future work that addresses the limitations is outlined.

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AbstractThe current study examined 98 participants' preferences for five pictorial stimuli. The researchers used a verbal multiple‐stimulus‐without‐replacement (VMSWO) preference assessment with each participant to identify high‐preference and low‐preference pictorial stimuli. Next, participants viewed each pictorial stimulus in a randomized order on a computer while using a hand dynamometer that measured the amount of force they exerted to increase or maintain the visual clarity of each image. The results indicate that over 75% of participants' force response ranks corresponded with participants' VMSWO high‐preference stimuli, VMSWO low‐preference stimuli, or both. The results of the current study provide further evidence for the use of conjugate schedules in the assessment of stimulus preference with potential for use as a reinforcer assessment. Implications along with directions for future research and limitations of the findings are discussed.

AbstractIntimacy is an interpersonal repertoire related to physical and behavioral health indicators. Functional analytic psychotherapy (FAP) is a behavioral intervention that has demonstrated utility in improving intimacy repertoires, particularly in experimental single-case designs. The FAP Intimacy Scale (FAPIS) was developed with the aim of using a theoretically sound measure to evaluate FAP effects on a large scale. This study sought to culturally adapt and validate the FAPIS for Spanish-speaking populations. A total sample of 509 Spanish-speaking participants completed the survey. Exploratory and confirmatory factor analyses were conducted to examine FAPIS psychometric properties. A network analysis was also performed to assess the relation among scale factors. As expected, the FAPIS Spanish version demonstrated a good fit, meeting the same three-factor structure as the original version. Network loading along three factors was also found, and item 3 was identified as the most central item in the scale. Low and negative correlations among FAPIS, experiential avoidance, emotional sensitivity, and social impact were found. Findings showed that FAPIS is a valid and reliable measure for assessing intimacy in Spanish-speaking populations.

AbstractAssessment of challenging behavior via functional analysis (FA) and subsequent treatment including functional communication training (FCT) is a common approach to treating severe problem behavior for individuals with autism and intellectual disability. Assessment and treatment for these behaviors exhibited by individuals who have a co‐occurring diagnosis of visual impairment and autism spectrum disorder present unique challenges to this approach. The current study included an 8‐year‐old White, visually impaired male on the autism spectrum who engaged in self injurious behavior (SIB). Based on the results of the FA, conducted in his classroom, the researchers began FCT to address the multiple maintaining functions of SIB. Results suggest that adaptations to FCT may be necessary for visually impaired individuals on the autism spectrum to make the communication response more salient to the individual and establish independent communication responses.

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