An item and construct bias analysis of two language versions of a verbal analogies scale

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dc.contributor.authorRoomaney, Rizwana
dc.contributor.authorKoch, Elize
dc.date.accessioned2017-06-30T09:18:07Z
dc.date.available2017-06-30T09:18:07Z
dc.date.issued2013
dc.description.abstractThe Woodcock Muñoz Language Survey is a test of cognitive academic language proficiency that has been adapted from English into Xhosa by a South African team of researchers. This study was primarily concerned with the Verbal Analogies Scale of the Woodcock Muñoz Language Survey and aimed to extend previous research on the equivalence of the two language versions of the scale. The study employed a monolingual two-group design consisting of 150 mainly English-speaking and 149 mainly Xhosa learners in Grades 6 and 7. The first research objective was to investigate item bias (or differential item functioning items) in the Visual Analogies Scale across the Xhosa and English versions using logistic regression and Mantel–Haenszel statistical techniques. Five items were identified as differential item functioning. The second objective was to evaluate the construct equivalence of the two versions by conducting a factor analysis after removing the differential item functioning items from the scale. Two factors were identified. The first factor displayed significant loadings across both language versions. The second factor was stable for the English version but not for the Xhosa version. Results were supported by calculating a Tucker’s phi coefficient for both factors. It was therefore concluded that Factor 1 is structurally equivalent across the two language versions but that Factor 2 was not structurally equivalent. Thus, the detection and removal of differential item functioning items did not result in structural equivalence.en_US
dc.description.accreditationDepartment of HE and Training approved list
dc.identifier.citationRoomaney, R. & Koch, E. (2013). An item and construct bias analysis of two language versions of a verbal analogies scale. South African Journal of Psychology, 43(3): 314–326en_US
dc.identifier.issn0081-2463
dc.identifier.urihttp://hdl.handle.net/10566/3020
dc.identifier.urihttp://dx.doi.org/10.1177/0081246313493377
dc.language.isoenen_US
dc.privacy.showsubmitterFALSE
dc.publisherSAGE Publicationsen_US
dc.rightsThis is the author-version of the article published online at: http://dx.doi.org/10.1177/0081246313493377
dc.status.ispeerreviewedTRUE
dc.subjectBiasen_US
dc.subjectEquivalenceen_US
dc.subjectVerbal analogies scaleen_US
dc.subjectDifferential item functioningen_US
dc.subjectExploratory factor analysisen_US
dc.titleAn item and construct bias analysis of two language versions of a verbal analogies scaleen_US
dc.typeArticleen_US

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