The 40-year history of meta-analysis is traced from the vantage point of one of its originators. Research syntheses leading to the first examples of meta-analysis are identified. Early meta-analyses of the literature on psychotherapy outcomes and school class size are recounted. The influence on the development of meta-analysis of several…

Traditional methods of integrating special education research (such as narrative reviews and box score analyses) are described, and the procedures involved in meta-analysis, by which findings from previous studies are systematically synthesized, are detailed. Benefits of this approach are noted. (CL)

Integrative analysis, or what is coming to be known as meta-analysis, is the integration of the findings of many empirical research studies of a topic. Meta-analysis differs from traditional narrative forms of research reviewing in that it is more quantitative and statistical. Thus, the methods of meta-analysis are merely statistical methods,…

The failure of common methods of research synthesis to arrive at conclusions about effectiveness of special education is discussed. Meta-analysis, the analysis of analyses, is proposed as an alternative. Results of meta-analyses in the areas of special versus regular class placement, process training, and medically-based intervention are…