ABSTRACT
This chapter describes multiple baselines and multiple probe designs and their use by applied researchers investigating the effectiveness of a wide range of interventions within educational and clinical settings. It explains how baseline logic applies to this class of designs, and discusses how threats to internal validity. The chapter presents general considerations and guidelines for their use, discussing advantages and limitations of both designs. Multiple baseline and multiple probe designs have been used extensively by applied researchers because of their compatibility with educational and clinical practice, and therefore, warrant student researchers' serious consideration. The chapter examines the three types of multiple baseline and multiple probe designs: across behaviors, across conditions, and across participants. Multiple baseline and multiple probe designs are better suited to many of the practical demands of applied settings than are A-B-A-B designs. Multiple baseline and multiple probe designs also can be problematic.
