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The Impact of Measurement Model Misspecification on Coefficient Omega Estimates of Composite Reliability. [PDF]
Educ Psychol Meas, 2023 Coefficient omega indices are model-based composite reliability estimates that have become increasingly popular. A coefficient omega index estimates how reliably an observed composite score measures a target construct as represented by a factor in a factor-analysis model; as such, the accuracy of omega estimates is likely to depend on correct model ...
Bell SM, Chalmers RP, Flora DB.
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A Comparison of Composite Reliability Estimators: Coefficient Omega Confidence Intervals in the Current Literature. [PDF]
Educ Psychol Meas, 2016 Coefficient omega and alpha are both measures of the composite reliability for a set of items. Unlike coefficient alpha, coefficient omega remains unbiased with congeneric items with uncorrelated errors. Despite this ability, coefficient omega is not as widely used and cited in the literature as coefficient alpha.
Padilla MA, Divers J.
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Overestimation of Internal Consistency by Coefficient Omega in Data Giving Rise to a Centroid-Like Factor Solution. [PDF]
Educ Psychol MeasCoefficient Omega measuring internal consistency is investigated for its deviations from expected outcomes when applied to correlational patterns that produce variable-focused factor solutions in confirmatory factor analysis. In these solutions, the factor loadings on the factor of the one-factor measurement model closely correspond to the correlations
Schweizer K, Wang T, Ren X.
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Testing the Difference Between Reliability Coefficients Alpha and Omega [PDF]
Educational and Psychological Measurement, 2016 Reliable measurements are key to social science research. Multiple measures of reliability of the total score have been developed, including coefficient alpha, coefficient omega, the greatest lower bound reliability, and others. Among these, the coefficient alpha has been most widely used, and it is reported in nearly every study involving the measure ...
Lifang, Deng, Wai, Chan
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Electronic Journal of Differential Equations, 2022 In this article, we study (omega, c)-periodic solutions for non-instantaneous impulsive systems and the time-varying coefficient A(t) is a family of unbounded linear operators. We show the existence and uniqueness of (omega, c)-periodic solutions using a fixed point theorem. An example is given to illustrate our results.
Kui Liu +3 more
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Robust Coefficients Alpha and Omega and Confidence Intervals With Outlying Observations and Missing Data [PDF]
Educational and Psychological Measurement, 2015 Cronbach’s coefficient alpha is a widely used reliability measure in social, behavioral, and education sciences. It is reported in nearly every study that involves measuring a construct through multiple items. With non-tau-equivalent items, McDonald’s omega has been used as a popular alternative to alpha in the literature.
Zhiyong, Zhang, Ke-Hai, Yuan
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Bootstrap Interval Estimation of Reliability via Coefficient Omega
Journal of Modern Applied Statistical Methods, 2013 Introduction Coefficient omega was proposed in the literature over 40 years ago (McDonald, 1970) as a reliability measure of homogenous items from a measurement instrument. It indexes the consistency with which the items measure the underlying latent variable (or construct).
Miguel A. Padilla, Jasmin Divers
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Examining Cronbach Alpha, Theta, Omega Reliability Coefficients According to Sample Size
Journal of Modern Applied Statistical Methods, 2007 Differentiations according to the sample size of different reliability coefficients are examined. It is concluded that the estimates obtained by Cronbach alpha and teta coefficients are not related with the sample size, even the estimates obtained from the small samples can represent the population parameter.
SIĞIRLI, DENİZ +4 more
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Calculation of transmission coefficients for omega signals penetrating into sea water
Electronics Letters, 1978 Approximate expressions for the transmission coefficients for v.l.f. waves (10.2?13.6 kHz) incident on an air-sea boundary give values in good agreement with those obtained by more elaborate methods of calculation.
P.J.D. Gething, A. Mobbs
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A Primer on Reliability via Coefficient Alpha and Omega
Archives of Psychology, 2019 Reliability is an important property to established for a measurement instrument. There are several types of reliabilities and each with its own purposes. However, whether warranted or not, internal consistency via coefficient alpha has been the standard for establishing the reliability of a measurement instrument for over 60 years. During this time,
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