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Direct linkVacha-Haase, Tammi; Thompson, Bruce – Measurement and Evaluation in Counseling and Development, 2011
The present study was conducted to characterize (a) the features of the thousands of primary reports synthesized in 47 reliability generalization (RG) measurement meta-analysis studies and (b) typical methodological practice within the RG literature to date. With respect to the treatment of score reliability in the literature, in an astounding…
Descriptors: Reliability, Generalization, Scores, Meta Analysis
Peer reviewedVacha-Haase, Tammi; Henson, Robin K.; Caruso, John C. – Educational and Psychological Measurement, 2002
Reliability generalization (RG) is a measurement meta-analytic method used to explore the variability in score reliability estimates and to characterize possible sources of the variance. Summarizes some RG considerations, and suggests how confidence intervals might be portrayed graphically. (SLD)
Descriptors: Generalization, Meta Analysis, Reliability, Scores
Peer reviewedVacha-Haase, Tammi; Kogan, Lori R.; Thompson, Bruce – Educational and Psychological Measurement, 2000
Investigated how dissimilar in composition and variability samples inducting reliability coefficients from prior studies were from the cited prior samples from which coefficients were generalized. Results from 20 articles show that citing reliability coefficients from prior studies as the basis for concluding new scores are reliable is only…
Descriptors: Reliability, Sampling, Scores, Test Manuals
Peer reviewedThompson, Bruce; Vacha-Haase, Tammi – Educational and Psychological Measurement, 2000
Responds to criticisms of some "Educational and Psychological Measurement" policies and the reliability generalization meta-analytic methods of T. Vacha-Haase. Explores consequences of misunderstanding score reliability. (SLD)
Descriptors: Generalization, Meta Analysis, Psychometrics, Reliability
Peer reviewedVacha-Haase, Tammi; Kogan, Lori R.; Tani, Crystal R.; Woodall, Renee A. – Educational and Psychological Measurement, 2001
Used reliability generalization to explore the variance of scores on 10 Minnesota Multiphasic Personality Inventory (MMPI) clinical scales drawing on 1,972 articles in the literature on the MMPI. Results highlight the premise that scores, not tests, are reliable or unreliable, and they show that study characteristics do influence scores on the…
Descriptors: Clinical Diagnosis, Diagnostic Tests, Generalization, Reliability
Peer reviewedHenson, Robin K.; Kogan, Lori R.; Vacha-Haase, Tammi – Educational and Psychological Measurement, 2001
Studied sources of measurement error variance in the Teacher Efficacy Scale (TES) (Gibson and Dembo, 1984). Used reliability generalization to characterize the typical score reliability for the TES and potential sources of measurement error variance across 43 studies. Also examined related instruments for measurement integrity. (SLD)
Descriptors: Error of Measurement, Generalization, Meta Analysis, Psychometrics
Peer reviewedVacha-Haase, Tammi – Educational and Psychological Measurement, 1998
Proposes a new method, reliability generalization, for meta-analysis. Reliability generalization characterizes the typical reliability of scores for a test across studies, the amount of variability in reliability coefficients, and the sources of this variability. Analysis of 87 reliability coefficients for two scales of the Bem Sex Role Inventory…
Descriptors: Error of Measurement, Generalization, Meta Analysis, Reliability
