Conceptions of reliability revisited, and practical recommendations

K. Sijtsma, L.A. van der Ark

Research output: Contribution to journalArticleScientificpeer-review

26 Citations (Scopus)


We discuss reliability definitions from the perspectives of classical test theory, factor analysis, and generalizability theory. For each method, we discuss the rationale, the estimation of reliability, and the goodness of fit of the model that defines the reliability coefficient to the data. Similarities and differences in the three approaches are highlighted. Finally, we provide a computational example using generated data to illustrate the differences among the different reliability methods.
Original languageEnglish
Pages (from-to)128-136
JournalNursing Research
Issue number2
Publication statusPublished - 2015


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