Key points are not available for this paper at this time.
The inferences made in integrative research reviews are as central to the validity of behavioral science knowledge as those made in primary research. Therefore, research reviewers must pay the same attention to rigorous methodology that is required of primary researchers. This article conceptualizes the research review as a scientific inquiry involving five stages that parallel those of primary research. The functions, sources of variance, and potential threats to validity associated with each stage are described.
Harris Cooper (1982) studied this question.