University of Groningen
Practical Significance of Item Response Theory Model Misfit Crisan, Daniela
DOI:
10.33612/diss.128084616
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Publication date: 2020
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Citation for published version (APA):
Crisan, D. (2020). Practical Significance of Item Response Theory Model Misfit: Much Ado About Nothing?. University of Groningen. https://doi.org/10.33612/diss.128084616
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Propositions
belonging to the dissertation
Practical Significance of Item Response Theory Model Misfit:
Much Ado About Nothing?
Daniela R. Crișan
1. The significance of IRT model misfit should be decided based primarily on theoretical considerations and within specific research contexts.
2. Items that violate IRT assumptions should not be immediately removed from the scale, unless there are strong theoretical reasons to do so.
3. The aim of constructing and using psychological tests should not primarily be to obtain unidimensional measures but instead to obtain measures that are
theoretically and practically useful.
4. The strict requirement of unidimensionality may have negative effects on the interpretability and usefulness of the resulting measures (Gustafsson and Åberg-Bengtsson, 2010).
5. Test constructors are often too optimistic about the stability of results when using small samples
6. Suitable thresholds for decision-making related to fit analysis should be determined by the user, taking the characteristics of the data and the research context into account.
7. “surely, God loves the H = .29 nearly as much as the H = .31” (this thesis, inspired by Rosnow and Rosenthal, 1989, p. 1277).
