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Single-case design effect-size distributions: Association with procedural parameters.

Jennifer R Ledford1, Paige B Eyler1, Sienna A Windsor1

  • 1Department of Special Education, Peabody College, Vanderbilt University.

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Summary
This summary is machine-generated.

Effect sizes in single-case studies help measure behavior change magnitude. This review analyzed elementary school interventions, finding design and measurement choices influence effect sizes for engagement and challenging behaviors.

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Area of Science:

  • Behavior analysis
  • Educational psychology
  • Single-case research design

Background:

  • Visual analysis is traditional for single-case studies, but effect sizes offer quantitative insights into behavior change.
  • Methodological choices in single-case designs may affect the magnitude of observed behavior change.
  • Limited research exists on how design type and measurement systems impact effect sizes.

Purpose of the Study:

  • To systematically review effect sizes in elementary school single-case intervention studies.
  • To characterize effect sizes for engagement and challenging behaviors.
  • To examine the influence of methodological factors on effect size magnitude.

Main Methods:

  • Systematic review of single-case intervention studies in elementary classrooms.
  • Analysis of effect sizes for engagement and challenging behaviors.
  • Examination of design types (e.g., A-B-A-B, multiple baseline) and measurement systems.

Main Results:

  • A-B-A-B and multiple baseline across-participants designs were most common.
  • Diverse measurement systems were used for engagement behaviors, but not challenging behaviors.
  • Effect size variability was linked to dependent variable type, design type, and measurement system.

Conclusions:

  • Empirically derived effect-size distributions can aid researchers in contextualizing single-case study findings.
  • Methodological choices are important considerations when interpreting effect sizes in single-case research.
  • This study provides valuable benchmarks for understanding behavior change in educational settings.