Detecting differential item functioning of polytomous items in small samples: Comparison of MIMIC with a Pure Anchor and MIMIC-Interaction methods

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dc.contributor.author Brown, Gavin en
dc.contributor.author Alqassab, M en
dc.contributor.author Bulut, O en
dc.contributor.author Xiao, J en
dc.date.accessioned 2020-05-08T03:13:32Z en
dc.date.available 2019-12-10 en
dc.date.issued 2020 en
dc.identifier.issn 2190-0493 en
dc.identifier.uri http://hdl.handle.net/2292/50567 en
dc.description.abstract Differential item functioning (DIF) may be a result of either item bias or a real difference depending on whether the source of DIF is either construct-irrelevant or construct-relevant. It is relatively more challenging to conduct DIF studies when the small sample is small (i.e., < 200), items follow polytomous scoring (e.g., Likert scales) instead of dichotomous scoring, and psychological grouping variables are used instead of demographic grouping variables (e.g., gender). However, the multiple indicators-multiple causes (MIMIC) approach can be a promising solution to address the aforementioned challenges in DIF studies. This study aims to investigate the performance of two MIMIC methods, namely MIMIC with a pure anchor (MIMIC-PA) and MIMIC-interaction methods, for DIF detection in the Student Conceptions of Assessment inventory based on a psychological grouping variable derived from students’ self-efficacy and subject interest. The results show that MIMIC-PA identified five mathematics and eight reading items with large DIF in the four factors. MIMIC-interaction showed that no items had uniform DIF, while four items had non-uniform DIF. Items with statistically significant DIF were aligned with the known effects of self-efficacy and subject interest on academic achievement, supporting the claim that observed DIF reflects item impact rather than bias. The study's implications for practice and directions for future research with the MIMIC approach are discussed. en
dc.relation.ispartofseries Psychological Test and Assessment Modeling en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.subject Differential item functioning en
dc.subject polytomous scales en
dc.subject small sample en
dc.subject MIMIC en
dc.title Detecting differential item functioning of polytomous items in small samples: Comparison of MIMIC with a Pure Anchor and MIMIC-Interaction methods en
dc.type Journal Article en
dc.rights.holder Copyright: The author en
pubs.publication-status Accepted en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 796128 en
pubs.org-id Education and Social Work en
pubs.org-id Learning Development and Professional Practice en
dc.identifier.eissn 2190-0507 en
pubs.record-created-at-source-date 2020-03-11 en


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