Meta-Analysis of Raw Mean Differences

This article discusses the meta-analysis of raw mean differences. It presents a rationale for cumulating psychological effects in a raw metric and compares raw mean differences to standardized mean differences. Some limitations of standardization are noted, and statistical techniques for raw meta-an...

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Bibliographic Details
Published in:Psychological methods 2003-12, Vol.8 (4), p.406-418
Main Authors: Bond, Charles F, Wiitala, Wyndy L, Richard, F. Dan
Format: Article
Language:English
Subjects:
Data Interpretation, Statistical
Effect Size (Statistical)
Humans
Mean
Meta Analysis
Meta-Analysis as Topic
Psychometrics - statistics & numerical data
Psychotherapy - statistics & numerical data
Randomized Controlled Trials as Topic - statistics & numerical data
Reproducibility of Results
Statistical Measurement
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Summary:This article discusses the meta-analysis of raw mean differences. It presents a rationale for cumulating psychological effects in a raw metric and compares raw mean differences to standardized mean differences. Some limitations of standardization are noted, and statistical techniques for raw meta-analysis are described. These include a graphical device for decomposing effect sizes. Several illustrative data sets are analyzed.
ISSN:1082-989X
1939-1463
DOI:10.1037/1082-989X.8.4.406