The purpose of this study was to evaluate the effectiveness of a high-probability request sequence on the latency to and duration of compliance to a request for completion of an independent math assignment. The participant was an elementary-school student with learning disabilities who exhibited noncompliance during math instruction. The results showed that high-probability requests were effective in reducing the latency to compliance but only minimally affected duration of engagement.DESCRIPTORS: high-probability request sequence, behavioral momentum, compliance, academic instruction The refusal to initiate or complete a requested task within a specified period of time is a commonly reported characteristic among children with academic and behavior problems. One strategy that has been used for treating task noncompliance is the highprobability (high-p) request sequence (Mace et al., 1988). Briefly, this technique involves preceding a request, to which a student has a history of noncompliance (low-probability or low-p requests), with a series of requests with which a student has a history of compliance (high-p requests). The purpose of this study was to evaluate the effectiveness of a high-p request sequence with an elementary-school student on the latency to and duration of compliance following a request for completion of math assignments.Preparation of this article was funded in part by the Office of Special Education Programs, U.S. Department of Education (Grant H023N30025). The article does not necessarily reflect the position or policy of the funding agency, and no official endorsement by them should be inferred. We acknowledge the assistance of Kim Dennis in completion of this study.Address correspondence to Joseph H. Wehby, Department of Special Education, Box 328, Peabody College of Vanderbilt University, Nashville, Tennessee 37202.
METHODParticipant and Setting. The participant was Meg, a 13-year-old girl functioning in the normal range of intellect (Standford-Binet full scale ϭ 92) who had been identified by the local school district as learning disabled in math and written language. The authors and Meg's teacher generated a list of potential high-p requests that were topically related to math assignments and that were confirmed through direct observation as highly probable to result in immediate compliance (at least 85% of total observed instances).Data collection. Data were collected during math class for (a) occurrence of the lowp requests, high-p requests, and praise by the teacher; (b) latency to the onset of engagement after the low-p requests; (c) compliance to the high-p request; and (d) termination of engagement to the low-p request (discontinuation of engagement for 10 consecutive s). Data were collected during daily 20-min sessions using the MOOSES software program on a laptop computer (Tapp, Wehby, & Ellis, 1995). These sessions were conducted Monday through Friday for a to-