How to Design and Evaluate Research in Education, 5/e

Jack R. Fraenkel, San Francisco State University
Norman E. Wallen, San Francisco State University

Single-Subject Research

Learning Objectives

Studying this chapter should enable you to:

Describe briefly the purpose of single-subject research.

Describe the essential characteristics of such research.

Describe two ways in which single-subject research differs from other forms of experimental research.

Explain what a baseline is and why it is used.

Explain what an A-B design is.

Explain what a reversal (A-B-A) design is.

Explain what an A-B-A-B design is.

Explain what a B-A-B design is.

Explain what an A-B-C-B design is.

Identify various threats to internal validity associated with single-subject studies.

Explain three ways in which threats to internal validity in single-subject studies can be controlled.

Discuss the external validity of single-subject research.

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