Comparison studies conducted to determine which instructional interventions are most efficient for teaching discrete behaviors to individuals with disabilities are potentially valuable, although some threats to internal validity may be more likely in these studies. Studies included in this review typically met common internal validity standards, such as reliability measurement, but often did not include controls specific to comparison designs. Comparisons often included young children with autism and were frequently conducted by researchers in self-contained classroom settings. Systematic instruction was effective in nearly all comparisons, although many included undifferentiated data (i.e., both interventions were equally effective), and within-participant replications were often inconsistent (i.e., outcomes varied across comparisons for a single participant). Results suggest implementers should conduct high-fidelity instruction with corrective and instructive feedback and should choose intervention variations based on participant preference. We recommend researchers include control sets or time-lagged introductions, counterbalance behavior sets, and measure differential acquisition over time.

Limited data are available regarding how response prompting procedures should be used in early childhood settings. The purpose of this study was to compare the efficiency of progressive time delay instruction presented via two trial arrangements: massed and embedded. During massed trial sessions, a short instructional session was conducted, followed by game play. During embedded trial sessions, trials were conducted during game play. Across 12 participants with and without disabilities, efficiency and preference data were mixed. Preference data suggested most participants preferred the instruction type that resulted in most efficient learning. Social validity data suggest inservice and preservice practitioners may be equally likely to use the procedures, but some respondents indicated they might be less willing to use embedded trial arrangements due to increased effort in materials preparation. Implications include the possibility that faster learners may learn better in embedded contexts and that children may prefer instructional contexts that are most efficient for them. Keywords instruction, massed, embedded, time delay, adapted alternating treatments design Research Question 1: Does instruction using massed trial arrangements versus trials embedded in game play result in differential efficiency of acquisition? Research Question 2: Do children prefer either arrangement? Research Question 3: What is the relationship between acquisition and preference? Research Question 4: Do practitioners report differential likelihood of use for instruction using massed trial arrangements versus trials embedded into game play?

An antecedent exercise (AE) intervention was conducted with two young children who demonstrated challenging behaviors during a large group circle time activity in a preschool classroom; outcomes were evaluated in the context of alternating treatments designs. Results from the initial visual analysis suggested no overlap between conditions, with small, consistent effects favoring the AE condition. However, plotting reliability data suggested observer bias was present for one participant. Subsequently (post hoc), a blind observer coded data from all conditions for that participant. Results suggested that no functional relation was present for that participant. Implications include the need for blind data collectors and additional, highly rigorous studies assessing the effectiveness of AE.

For children with complex communication needs (CCN), augmentative and alternative communication (AAC) devices offer a means to communicate and participate in daily activities. Effective implementation and intervention practices are needed for supporting teaching teams working with children with CCN to improve child use of AAC. The purpose of this article is to describe two studies examining these issues. Study 1 examined the effects of a behavior skills training (BST) approach to professional development to support a classroom teaching team in the implementation of a behavior support plan for a child with CCN; Study 2 evaluated the effects of a single behavior (adult modeling) on AAC use. Results indicated teachers increased their fidelity with training and coaching, but not with training alone. Further, unprompted use of the AAC device occurred more frequently when an adult modeled use of the device.

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