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Institute of Education Sciences


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IES Grant

Title: Single-Case Research Design and Analysis: Applications in Educational Intervention Research
Center: NCSER Year: 2006
Principal Investigator: Kratochwill, Thomas Grantee: University of Wisconsin, Madison
Program: Unsolicited and Other Awards: Special Education Research      [Program Details]
Award Period: 10/1/2006 to 9/30/2009 Award Amount: $600,000
Award Number: R324U060001
Description:

Co-Principal Investigator: Joel Levin

Unsolicited Standards and Assessment Development Grant

Purpose: The purpose of this project is to review the current state of single-case research design and data analysis as applied to educational intervention research. The review will culminate in recommendations to single-case researchers to adopt more scientifically rigorous experimental designs and statistical analyses, thereby enhancing the validity of the researchers' conclusions. In addition, the researchers will consider methods for synthesizing the research literature from single-case research designs, including traditional literature reviews, meta-analyses, and effect-size estimates.

Project Activities: The project work will be conducted in following research domains:

  1. Research Design Types. The work in this area will illustrate how randomization can be incorporated into designs to improve the quality of research that involves single-case design;
  2. Data Analysis. This domain focuses on visual analysis of single subject designs, and will result in a comprehensive list of graphical aids that can be used to complement and improve the rigor of visual analysis.
  3. Statistical Strategies. This domain will explore statistical strategies that can be applied to single-case research data;
  4. Literature Summary that builds upon the previous three phases by demonstrating analytic methods that can be used to summarize findings across studies including a set of "best practices" guidelines for conducting single-case research.

Products: The products from this project will include a set of "best practices" guidelines and prescriptions for developing randomized single-case designs, performing visual and statistical analyses of data, and conducting literature reviews and quantitative syntheses of single-case research. The project directors will also host a summative conference that will bring together methodologists and intervention researchers to discuss contemporary issues and promising new directions in single-case research.

Publications from this project:

Lall, V. F., & Levin, J. R. (2004). An empirical investigation of the statistical properties of generalized single-case randomization tests. Journal of School Psychology, 42 (1), 61–86. doi: 10.1016/j.jsp.2003.11.002.

Swoboda, C., Kratochwill, T. R., & Levin, J. R. (2009). Conservative Dual-Criterion (CDC) method for single-case research. A guide for visual analysis of AB, ABAB, and multiple baseline designs. Madison, WI: University of Wisconsin-Madison.

Kratochwill, T. R., & Levin, J. R. (2010). Enhancing the scientific credibility of single-case intervention research: Randomization to the rescue. Psychological Methods, 15 (2), 122–144. doi: 10.1037/a0017736.

Levin, J. R., Lall, V. F., & Kratochwill, T. R. (2011). Extensions of a versatile randomization test for assessing single-case intervention effects. Journal of School Psychology, 49 (1), 55–79. doi: 10.1016/j.jsp.2010.09.002.

Ferron, J. M., & Levin, J. R. (in press). Single-case permutation and randomization statistical tests: Present status, promising new developments. In T. R. Kratochwill & J. R. Levin (Eds.), Single-case intervention research: Methodological and data-analysis advances. Washington, DC: American Psychological Association.

Kratochwill, T. R., Hitchcock, J. H., Horner, R. H., Levin, J. R., Odom, S. L., Rindskopf, D. M., & Shadish, W. R. (in press). Single-case intervention research design standards. Remedial and Special Education.

Kratochwill, T. R., & Levin, J. R. (in press). Single-case intervention research: Methodological and data-analysis advances. Washington, DC: American Psychological Association.

Kratochwill, T. R., Levin, J. R., Horner, R. H., & Swoboda, C. M. (in press). Visual analysis of single-case intervention research: Conceptual and methodological considerations. In T. R. Kratochwill & J. R. Levin (Eds.), Single-case intervention research: Methodological and data-analysis advances. Washington, DC: American Psychological Association.

Levin, J. R., Evmenova, A. S., & Gafurov, B. S. (in press). The single-case data-analysis ExPRT (Excel package of randomization tests). In T. R. Kratochwill & J. R. Levin (Eds.), Single-case intervention research: Methodological and data-analysis advances. Washington, DC: American Psychological Association.

Levin, J. R., Ferron, J. M., & Kratochwill, T. R. (in press). Nonparametric statistical tests for single-case systematic and randomized ABAB . . . AB and alternating treatment intervention designs: New developments, new directions. Journal of School Psychology. doi: 10.1016/j.jsp.2012.05.001


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