High-Probability Request Sequence to Increase Compliance of Children With Autism Spectrum Disorder: A Meta-Analysis

Sayar K., Gülboy E., YÜCESOY ÖZKAN Ş., BARAN M. S.

BEHAVIORAL DISORDERS, 2024 (SSCI) identifier identifier

  • Publication Type: Article / Review
  • Publication Date: 2024
  • Doi Number: 10.1177/01987429231224044
  • Journal Indexes: Social Sciences Citation Index (SSCI), Scopus, Academic Search Premier, Periodicals Index Online, CINAHL, EBSCO Education Source, Education Abstracts, ERIC (Education Resources Information Center), Psycinfo
  • Anadolu University Affiliated: Yes


Non-compliance is a challenge for practitioners serving children with and without disabilities. Many interventions have been developed to increase compliance. High-probability request sequences (HPRS), an antecedent-based intervention that is based on behavioral momentum theory, is one way to increase compliant behavior. HPRS includes the presentation of two-to-five easy or known tasks with a high probability of compliance immediately before requesting tasks with a low probability of compliance. The purpose of the current meta-analysis was to review the literature in the last 40 years on high-p request sequences as an intervention to improve compliance in children with autism spectrum disorder (ASD). Specifically, we examined the methodological rigor of the high-p single-case research for students with autism, identified the descriptive characteristics of these studies, and estimated treatment effects with Tau-U to determine whether HPRS is an evidence-based practice (EBP) for increasing compliance in children with ASD. Our results showed that HPRS is a very effective practice in increasing compliance in children with ASD (Tau-U = .87) and a promising EBP for improving compliance in children with ASD. Implications for future research and practice are discussed.