This "What Works Clearinghouse Procedures and Standards Handbook (Version 3.0)" provides a detailed description of the standards and procedures of the What Works Clearinghouse (WWC). The remaining chapters of this Handbook are organized to take the reader through the basic steps that the WWC uses to develop a review protocol, identify…

This article describes the multielement design, often recommended in single-subject research, and discusses its advantages and disadvantages for research in early intervention with handicapped children. The article concludes that the multielement design has many advantages, though multiple treatment interference is an issue of concern. (JDD)

This paper comments on the impact of computers on statistical analysis and presents a concise, nontechnical overview of five statistical methods now being applied in educational research. Appropriate uses of these techniques are pointed out, along with dangers concerning misapplications. (PP)