View article

There is little doubt that single-case designs play a major role in applied and clinical research in psychology, education, and related fields. The rapid proliferation of writings on single-case design is remarkable over the past 15 years, and especially since the author of this chapter edited a volume devoted to singlesubject research and strategies for evaluating change (Kratochwill, 1978). At that time there was only a handful of professional books devoted to this methodology and related issues. At this writing, the picture has changed dramatically, with a considerable number of professional works on both design and data analysis in the literature. Table 1.1 provides a listing of major textbooks in the area of singlecase research design and analysis. It can be observed that although work in this area has a solid foundation prior to 1980, many major works have appeared since that time.

An interesting phenomenon in …