@article{article_445350, title={The Comparison of Reliability Coefficients in Parallel, Tau-Equivalent, and Congeneric Measurements}, journal={Ankara University Journal of Faculty of Educational Sciences (JFES)}, volume={39}, pages={15–37}, year={2006}, DOI={10.1501/Egifak_0000000127}, author={Yurdugül, Halil}, keywords={Güvenirlik Katsayısı, Paralel Ölçme, Eşdeğer Ölçme, Eşbiçimli Ölçme, Konjenerik Ölçme}, abstract={The recent studies on reliability coefficients in composite tests and specially the biased of Cronbach α have become intense. If the items in composite tests have parallel measurements or <br />congeneric measurements, then reliability coefficients are yielded differently. In the composite tests, consist of binary items, when the items have congeneric measurements KR20 is applied, otherwise KR21 is applied as reliability coefficient. Similarly, for the polythomous items with congeneric measurements McDonald’s ω, otherwise Cronbach’s α is suggested to be used as reliability coefficient. In this study, first basic measurement types and reliability coefficients are defined, then Cronbach’s α, Armor’s θ, Heise and Bohrnstedt’s Ω, Revelle’s β, and McDonald’s ω coefficient, in relation to different measurements are compared. }, number={1}, publisher={Ankara Üniversitesi}