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Direct linkHafdahl, Adam R. – Journal of Educational and Behavioral Statistics, 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…
Descriptors: Monte Carlo Methods, Correlation, Matrices, Computation
Conn, Vicki S.; Hafdahl, Adam R.; Cooper, Pamela S.; Ruppar, Todd M.; Mehr, David R.; Russell, Cynthia L. – Gerontologist, 2009
Purpose: This study investigated the effectiveness of interventions to improve medication adherence (MA) in older adults. Design and Methods: Meta-analysis was used to synthesize results of 33 published and unpublished randomized controlled trials. Random-effects models were used to estimate overall mean effect sizes (ESs) for MA, knowledge,…
Descriptors: Meta Analysis, Intervention, Drug Therapy, Outcomes of Treatment
