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Using Single-Case Designs in Practical Settings: Is Within-Subject Replication Always Necessary?

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Summary
This summary is machine-generated.

Replication in behavior analysis using reversal designs may be simplified. Analyzing the initial AB component of 501 graphs showed that 85% of effects were replicated, suggesting effect size could predict replication necessity.

Keywords:
AB designEffect sizeError rateReplicationSingle-case design

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Area of Science:

  • Behavior analysis
  • Research methodology

Background:

  • Within-subject replication using reversal and multielement designs is standard in behavior analysis.
  • Treatment withdrawal inherent in these designs presents practical and ethical challenges.

Purpose of the Study:

  • To evaluate if initial AB components of ABAB graphs could predict replication outcomes.
  • To determine if effect size estimates can indicate the necessity of within-subject replication.

Main Methods:

  • Analysis of 501 ABAB graphs from theses and dissertations.
  • Experiment 1: Compared initial AB component results with subsequent phase reversals.
  • Experiment 2: Calculated effect size estimates to predict replication relevance.

Main Results:

  • Approximately 85% of initial effects were successfully replicated at least once.
  • Effect size estimates appear to predict the likelihood of successful within-subject replication.
  • Findings suggest potential for setting effect size thresholds to deem replication unnecessary.

Conclusions:

  • Initial AB components may offer a reliable indicator of treatment effects.
  • Effect size could guide decisions on the necessity of further within-subject replication.
  • Further research is required to validate these findings for practice.