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Transition States in Single Case Experimental Designs.

Kristen M Brogan1, John T Rapp1, Bailey R Sturdivant1

  • 1Auburn University, Auburn, AL, USA.

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Summary

Transition states in single-case experimental designs (SCEDs) can mislead researchers into thinking treatments are ineffective. This study found transition states in 7.4% of SCED graphs, potentially impacting treatment effect interpretations.

Keywords:
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Area of Science:

  • Behavioral Science
  • Research Methodology

Background:

  • Transition states, where baseline responding continues into treatment, complicate data interpretation in single-case experimental designs (SCEDs).
  • These states can lead to inaccurate conclusions regarding treatment effectiveness through visual analysis and statistical methods.
  • Potential for publication bias exists due to the misinterpretation of treatment effects.

Purpose of the Study:

  • To investigate the prevalence and characteristics of transition states in published SCED studies.
  • To understand the impact of transition states on the interpretation of treatment effects.

Main Methods:

  • A systematic review of 20 volumes of a journal specializing in SCED studies was conducted.
  • A transition state was defined as at least three consecutive data points in a treatment phase falling within the baseline range.
  • Data from graphs meeting inclusion criteria were analyzed to identify and quantify transition states.

Main Results:

  • Transition states were identified in 7.4% of the analyzed SCED graphs.
  • On average, transition states persisted for 4.9 data points before a discernible behavior change occurred.

Conclusions:

  • Transition states are a notable phenomenon in SCED research, present in a significant minority of studies.
  • The findings highlight the need for careful consideration of transition states during data analysis and interpretation to avoid biased conclusions.
  • Further research is recommended to explore the implications and develop strategies for managing transition states in SCEDs.