Methods for meta-analyzing single-case designs (SCDs) are needed to inform evidence-based practice in clinical and school settings and to draw broader and more defensible generalizations in areas where SCDs comprise a large part of the research base. The most widely used outcomes in single-case research are measures of behavior collected using…

The decision by the National Institute of Education panel on the effects of school desegregation to select (for meta-analysis) a small group of preferred studies based upon criteria chosen in advance of examining the studies was, in principle, a mistake. One usually cannot know until the data have been examined which of several competing…