ABSTRACT
This chapter focuses on single-case research designs (SCRDs) in school psychology. It also provides an overview of basic designs often used in the educational community: A1-B1-A2-B2 withdrawal designs, multiple-baseline designs, and alternating treatment designs (ALTs). SCRDs are often used in the fields of school psychology and special education because they are highly flexible and allow empirical inquiry to determine “what works” with an individual student, a class, or a school. A1-B1-A2-B2 designs involve multiple introductions and removals of the intervention, along with the measurement of the dependent variable multiple times during each phase, to determine the relationship between the two variables. Using an A1-B1-A2-B2 design, Miller, Dufrene, Olmi, Tingstrom, and Filce examined the impact of self-monitoring as a viable fading option in check-in/check-out. ALTs involve the implementation of multiple interventions during the same phase, allowing researchers to draw inferences about the relative effectiveness of each intervention.
