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Raykov, Tenko – Multivariate Behavioral Research, 1997
The population discrepancy between Cronbach's Coefficient Alpha (L. Cronbach, 1951) and scale reliability with fixed congeneric measure, uncorrelated errors, and sampling of subjects was studied. The difference is expressed in terms of the individual component violations of the assumption of equal tau-equivalence that is necessary and sufficient…
Descriptors: Error of Measurement, Reliability, Sampling, Scaling
Raykov, Tenko; Marcoulides, George A. – International Journal of Testing, 2006
A structural equation modeling approach to scale reliability evaluation can be employed to estimate generalizability theory indexes in settings where sampling of subjects and conditions is carried out. In one- and two-facet crossed designs, it is demonstrated how this method can be used to obtain estimates of relative generalizability…
Descriptors: Computation, Generalizability Theory, Structural Equation Models, Reliability

Raykov, Tenko – Applied Psychological Measurement, 1997
Describes a structural equation model that permits estimation of the reliability index and coefficient of a composite index for congeneric measures. The method is also helpful in exploring the factorial structure of an item set, and its use in scale reliability estimation and development is illustrated. (SLD)
Descriptors: Estimation (Mathematics), Reliability, Structural Equation Models, Test Construction
Horowitz, Amy; Reinhardt, Joann P.; Raykov, Tenko – Journal of Visual Impairment & Blindness, 2007
This article describes the development and evaluation of a short form of the 24-item Adaptation to Age-Related Vision Loss (AVL) scale. The evaluation provided evidence of the reliability and validity of the short form (the AVL12), for significant interindividual differences at the baseline and for individual-level change in AVL scores over time.…
Descriptors: Measures (Individuals), Psychometrics, Vision, Test Validity

Raykov, Tenko – Multivariate Behavioral Research, 2002
Proposes an analytic approach to standard error and confidence interval estimation of scale reliability with fixed congeneric measures. The method is based on a generally applicable estimator stability evaluation procedure, the delta method. The approach, which combines wide-spread point estimation of composite reliability in behavioral scale…
Descriptors: Error of Measurement, Estimation (Mathematics), Rating Scales, Reliability

Raykov, Tenko – Applied Psychological Measurement, 1998
Proposes a method for obtaining standard errors and confidence intervals of composite reliability coefficients based on bootstrap methods and using a structural-equation-modeling framework for estimating the composite reliability of congeneric measures (T. Raykov, 1997). Demonstrates the approach with simulated data. (SLD)
Descriptors: Error of Measurement, Estimation (Mathematics), Reliability, Simulation
Raykov, Tenko; du Toit, Stephen H. C. – Structural Equation Modeling: A Multidisciplinary Journal, 2005
A method for estimation of reliability for multiple-component measuring instruments with clustered data is outlined. The approach is applicable with hierarchical designs where individuals are nested within higher order units and exhibit possibly related performance on components of a scale of interest. The procedure is developed within the…
Descriptors: Structural Equation Models, Computation, Measurement Techniques, Test Reliability

Raykov, Tenko – Applied Psychological Measurement, 1998
Examines the relationship between Cronbach's coefficient alpha and the reliability of a composite of a prespecified set of interrelated nonhomogeneous components through simulation. Shows that alpha can over- or underestimate scale reliability at the population level. Illustrates the bias in terms of structural parameters. (SLD)
Descriptors: Reliability, Simulation, Statistical Bias, Structural Equation Models
Raykov, Tenko – Behavior Therapy, 2004
A latent variable modeling approach to reliability and measurement invariance evaluation for multiple-component measuring instruments is outlined. An initial discussion deals with the limitations of coefficient alpha, a frequently used index of composite reliability. A widely and readily applicable structural modeling framework is next described…
Descriptors: Interpersonal Relationship, Measures (Individuals), Interaction, Error of Measurement