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Single-case experimental designs. 2: Common examples

R Behi¹, M Nolan

¹Postregistration Education Department, School of Nursing and Midwifery Studies, University of Wales, Bangor, Gwynedd.

British Journal of Nursing (Mark Allen Publishing)

|January 12, 1997

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This article reviews single-case experimental designs like reversal and non-reversal, offering guidance on their application in research. It details specific designs such as A-B-A-B, B-A-B, and A-B1-A-B2-A-Bn for various research scenarios.

Area of Science:

Behavioral Science
Research Methodology

Background:

Single-case experimental designs are crucial for evaluating interventions in various fields.
Understanding different designs is key to robust research.
Commonly used designs include reversal and non-reversal approaches.

Purpose of the Study:

To describe and discuss commonly used single-case experimental designs.
To provide guidance on selecting appropriate designs for specific research questions.
To highlight the utility of reversal and non-reversal designs.

Main Methods:

Review and discussion of established single-case experimental designs.
Explanation of the A-B-A-B design and its applications.
Description of the B-A-B design for ongoing interventions.

Related Experiment Videos

Elaboration on the A-B1-A-B2-A-Bn design for studying variable levels.

Discussion of non-reversal multiple baseline designs.

Main Results:

The A-B-A-B design is recommended for maintaining treatment phases.
The B-A-B design is suitable for interventions already in progress.
The A-B1-A-B2-A-Bn design facilitates the study of different independent variable levels.
Two types of non-reversal multiple baseline designs are presented.

Conclusions:

Appropriate selection of single-case experimental designs enhances research validity.
Reversal and non-reversal designs offer flexible options for intervention research.
The discussed designs provide a framework for rigorous single-case research.