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Meta-analysis at 20: retrospect and prospect.

¹University of Iowa, USA.

Evaluation & the Health Professions

|November 4, 1995

Summary

This summary is machine-generated.

Meta-analysis, a method for research integration, has been formalized for 20 years. This review explores its methods, advantages, and criticisms within the broader field of research synthesis.

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Area of Science:

Research methodology
Evidence synthesis
Scientific review

Background:

Formalization of meta-analysis by Gene Glass 20 years ago.
Meta-analysis as a key tool in research integration.
The evolving landscape of quantitative research synthesis.

Purpose of the Study:

To explore the nature of meta-analysis.
To contextualize meta-analysis within research synthesis.
To analyze the advantages, criticisms, and future directions of meta-analysis.

Main Methods:

Brief description of meta-analysis techniques.
Comparison and contrast with other research integration methods.
Illustrative examples of meta-analysis findings.

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Main Results:

Demonstration of the advantages of quantitative review methods.
Analysis of common criticisms leveled against meta-analyses.
Identification of unresolved questions regarding meta-analysis.

Conclusions:

Meta-analysis is a powerful quantitative approach to research synthesis.
Understanding meta-analysis methods and limitations is crucial for effective evidence integration.
Further research is needed to address the future direction of meta-analysis.