ABSTRACT
Single-case experimental designs (SCEDs) have received increasing attention in the past decade in clinical intervention studies, mainly because of their great conceptual and practical value in providing answers to clinically-relevant questions. SCED studies can serve as an alternative to, or in addition to, Randomized Controlled Trials. This chapter provides descriptions of the main features of SCEDs, namely: research questions that can be answered using SCEDs, and issues related to design and data analyses. In addition, using a fictitious example, we illustrate a single-case study which tests both effectiveness as well as change processes in an anxious adolescent treated with cognitive behavioral therapy. In the last section of the chapter, several recent challenges are highlighted which may, when resolved, lead to even greater implementation of this useful design in clinical (research) practice.
