Effective and efficient skill-acquisition procedures must be identified to support individualized behavioral programming for children with autism spectrum disorder (ASD). To do this, practitioners and researchers may use assessment-based instruction. Prompts are a common teaching strategy to promote skill acquisition. The purpose of this applied study was to use assessment-based instruction to evaluate the efficacy and efficiency of within- and extra-stimulus prompts to teach conditional discriminations to two children with ASD. We identified stimulus prompts using a survey of popular children's games and conducted a tablet-based instruction readiness assessment. Stimulus prompts involved motion (within-stimulus) and pointing (extra-stimulus) to evoke correct responses in the presence of a discriminative stimulus. We used an adapted alternating treatments design with a no-treatment control condition to evaluate the effects of both prompt types across multiple sets of stimuli. Both stimulus prompt types were efficacious in facilitating skill acquisition for two of three participants. Little difference was observed in the time to mastery with either prompt. Neither stimulus prompt was efficacious for the third participant. Assessment results will be used to inform clinical programming to teach conditional discriminations to participants and contribute to research on designing and implementing assessments of skill-acquisition procedures.

People with intellectual disabilities (ID) face a high risk of experiencing adverse events including abuse, neglect, and serious medical issues. Access to effective interventions for people with moderate to severe ID is limited because of communication deficits that are characteristic of this population. Some of the negative effects of exposure to trauma for people with ID can include increases in problem behaviors. Behavior analysts have developed robust assessments and treatments to address these problem behaviors for people with ID; however, when these behaviors arise after a traumatic event, specialized assessments may be necessary to ensure effective treatment and decreased risk of re-traumatization. Specifically, if trauma-related stimuli (TRS) differentially affect preferences and functions of behavior, assessments of the effects of these stimuli may be critical to mitigate those effects. In my first experiment I found that TRS differentially affected behavior (including heartrate) during preferences assessments. In my second experiment I found that TRS differentially affected heartrate and the function of problem behavior for two of three participants. I discuss implications of these findings, including 1) that measuring some of the physiological effects of TRS using commercially available heart rate monitors could improve behavior analytic assessments for people with potential trauma histories; …