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Reliability of Composite Dichotomous Measurements
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SYSNO ASEP 0353038 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Reliability of Composite Dichotomous Measurements Tvůrce(i) Martinková, Patrícia (UIVT-O) SAI, RID, ORCID
Zvára, Karel (UIVT-O)Zdroj.dok. European Journal for Biomedical Informatics. - : Pulsus Group - ISSN 1801-5603
Roč. 6, č. 2 (2010), s. 103-109Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova reliability ; binary data ; logistic regression ; Cronbach alpha ; Rasch model ; myocardial perfusion diagnosis Vědní obor RIV BB - Aplikovaná statistika, operační výzkum CEP 1M06014 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z10300504 - UIVT-O (2005-2011) DOI 10.24105/ejbi.2010.06.2.4 Anotace In this paper we examine a more general definition of reliability, which is based on decomposition of variance in mixed effects model. Proposed definition covers the classical definition of reliability and it is, moreover, appropriate for dichotomous measurements, too. Newly, for the proposed definition assumptions are derived, under which the reliability of composite measurement can be predicted by reliability of single measurement (Spearman-Brown formula) and approximate validity of Spearman-Brown formula is shown for the Rasch model. Finally, as a modification of the classical estimate of reliability based on Cronbach's alpha, we examine its counterpart logistic alpha, which appears to be more appropriate for composite dichotomous measurements in some cases. The new estimate is used in binary data of computerized process of myocardial perfusion diagnosis from cardiac single proton emission computed tomography (SPECT). Pracoviště Ústav informatiky Kontakt Tereza Šírová, sirova@cs.cas.cz, Tel.: 266 053 800 Rok sběru 2011
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