SUMMARIZING SINGLE-SUBJECT RESEARCH - ISSUES AND APPLICATIONS

In this article, literature concerning the quantitative synthesis (met a-analysis) of single-subject research literature is reviewed. First, the general rationale for such an approach is discussed. Next procedur es for synthesizing single-subject literature are described, followed by comments and critiques of those procedures. Finally, a review is pr esented of the results of applications of those procedures. The author s suggest that procedures based on percentage of nonoverlapping data ( PND) between baseline and treatment are justifiable, meaningful, and-a cross nine applications-have produced results that are highly meaningf ul and faithful to the original research reports.