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Single-Case Design

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Jennifer Cook

on 13 February 2015

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Transcript of Single-Case Design

This research design method is typically used in casual relations, that can be easily measured/examined frequently throughout your study.

The ability to identify "stable trends through many repeated measures enhances the internal validity of evaluations that cannot utilize control groups by enabling the researcher to identify the exact change in the dependent variable"
Effectiveness of Research Design:
Effective method in evaluating your practice.
Develops a system that provides continuous feedback.
Ability to combine variations of interventions to test the effectiveness of intervention compared to the baseline.
Single-Case Design
What to Measure:
Select measures/subjects that can be operationalized frequently.
Typically a casual study.
Typically only one participant or one group of participants.
If you decide to implement triangulation, note it does not mean you are required to use three measures, just more than 1.
Alternative Single-Case Designs
AB: The Basic Single-Case Design
ABAB: Withdraw/Reversal Design
Multiple-Baseline Designs
Multiple-Component Designs
B or B+ Designs in Evidence-Based Practice
Data Quantification Procedures
Additional Resources:
National Center for Technology Innovation:
Single-Case Design Brief:

Case Study:
Nock, M.K., Michel, B.D., & Photos, V.I. (2007). Single-case research designs. p. 337-350. New York, NY: Sage Publications.
http://www.sagepub.com/upm data/19353_Chapter_22.pdf

Bropher, G (2000). Social work treatment of sleep disturbance in
a 5-year-old boy: A single-case evaluation.
Research on Social Work Practice
, 10 (6), 749-760.

Key Aspects
Single-Case Design
The Baseline Phase:
"The logic of single-case designs requires taking enough repeated measures to make it unlikely that extraneous factors would account for improvements that take place in the target problem with the onset of intervention."
Rubin & Babbie, 2013, p. 214
Find a case study that used a single-case design using ABA or ABAB design.
Rubin, A., & Babbie, E. (2013). Essential
research methods for social work (3rd ed.). Belmont, CA: Brooks/Cole Cengage Learning

Westerfelt, A. & Dietz, T.J. (2010).
Planning and conducting agency-based research (4th ed.). Boston, MA: Allyn & Bacon
Full transcript