Meta-analysis has become an important supplement to traditional methods of research reviewing, although many problems must be addressed by the reviewer who carries out a meta-analysis. These problems include identifying and obtaining appropriate studies, extracting estimates of effect size from the studies, coding or classifying studies, analyzing…

This digest examines the organization of and international studies conducted by the International Association for the Evaluation of Educational Achievement (IEA). The IEA is a non-profit, private association that conducts international comparative studies on schools and aids the research community in developing international tests and statistical…

Directed at practitioners in adult and career education, this document defines qualitative research, compares qualitative research to quantitative research, describes the "war" between proponents of each kind of research, describes how to assess qualitative research, and explains how to choose and use qualitative techniques. Pitfalls of…