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ERIC Number: EJ879660
Record Type: Journal
Publication Date: 2008
Pages: 27
Abstractor: As Provided
Reference Count: 28
ISSN: ISSN-1076-9986
Combining Heterogeneous Correlation Matrices: Simulation Analysis of Fixed-Effects Methods
Hafdahl, Adam R.
Journal of Educational and Behavioral Statistics, v33 n4 p507-533 2008
Monte Carlo studies of several fixed-effects methods for combining and comparing correlation matrices have shown that two refinements improve estimation and inference substantially. With rare exception, however, these simulations have involved homogeneous data analyzed using conditional meta-analytic procedures. The present study builds on previous evidence about these methods' relative performance by examining their behavior under heterogeneity, which is more realistic in practice. Results based on both conditional and unconditional estimands indicate that of the two refinements, using estimated correlations in conditional (co)variances improves point and interval estimates of mean correlations more than analyzing Fisher Z correlations, despite the latter's superiority for testing homogeneity. Recommended choices among methods are offered. (Contains 4 notes, 2 tables, and 7 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A