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Related Experiment Videos

Randomization tests for restricted alternating treatments designs

P Onghena1, E S Edgington

  • 1Katholieke Universiteit Leuven, Department of Psychology, Belgium.

Behaviour Research and Therapy
|September 1, 1994
PubMed
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Restricted Alternating Treatments Designs (RATD) enhance single-case experiments by preventing repeated treatments. This study details the randomization procedure and statistical testing for RATD, offering a valuable tool for researchers.

Area of Science:

  • Psychology
  • Behavioral Science
  • Research Methodology

Background:

  • Alternating Treatments Designs (ATD) are powerful single-case experimental designs.
  • Complete randomization in ATD can lead to consecutive administrations of the same treatment, potentially confounding results.
  • Restricted randomization offers a solution to mitigate this issue.

Purpose of the Study:

  • To provide a general rationale for the random assignment procedure in Restricted Alternating Treatments Designs (RATD).
  • To derive the randomization test specifically for RATD.
  • To discuss a software package facilitating randomization tests in various single-case experimental designs.

Main Methods:

  • Development of a general rationale for random assignment in RATD.

Related Experiment Videos

  • Derivation of a corresponding randomization test for RATD.
  • Discussion of a software package for single-case randomization tests.

    • Main Results:

    • A clear rationale for random assignment in RATD is established.
    • The corresponding randomization test for RATD is derived.
    • A software package supporting RATD and other single-case designs is presented.

    Conclusions:

    • RATD provides a robust method for single-case experiments, improving upon standard ATD by restricting randomization.
    • The derived randomization test and discussed software enhance the application and analysis of RATD.
    • This work offers valuable methodological and practical tools for researchers in single-case experimental design.