Examining Cronbach Alpha, Theta, Omega Reliability Coefficients According to Sample Size

Examining Cronbach Alpha, Theta, Omega Reliability Coefficients According to Sample Size

Bayesian sample size Determination Using a Scaled Exponential Utility Function According to Numerical Method

‎In this paper we propose a utility function and obtain the Bayese stimate and the optimum sample size under this utility function‎. ‎This utility function is designed especially to obtain the Bayes estimate when the posterior follows a gamma distribution‎. ‎We consider a Normal with known mean‎, ‎a Pareto‎, ‎an Exponential and a Poisson distribution for an optimum sample size under the propose...

Effect Of Varying Sample Size In Estimation Of Reliability Coefficients Of Internal Consistency

Reliability refers to accuracy and precision of a measurement instrument or scale. Reliability of test scores are estimated through measures of internal consistency has been characterized mathematically in many ways that appear, on the surface at least, to be very different to one another. The coefficient alpha is the most widely used measure of internal consistency for composite scores. In thi...

Coefficients Alpha , Beta , Omega , and the Glb : Comments on Sijtsma

There are three fundamental problems in Sijtsma (Psychometrika, 2008): (1) contrary to the name, the glb is not the greatest lower bound of reliability but rather is systematically less than ωt (McDonald, Test theory: A unified treatment, Erlbaum, Hillsdale, 1999), (2) we agree with Sijtsma that when considering how well a test measures one concept, α is not appropriate, but recommend ωt rather...

Effect of Varying Sample Size in Estimation of Coefficients of Internal Consistency

Reliability refers to accuracy of a measurement instrument or scale. Reliability of test scores are estimated through measures of internal consistency has been characterized mathematically in many ways that appear, on the surface at least, to be very different to one another. The coefficient alpha is the most widely used measure of internal consistency for composite scores. In this article, the...