This Article Full Text (OnlineFirst PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Scopus Google Scholar Articles by Humphry, S. M. Social Bookmarking                         What's this?

Modeling the Effects of Person Group Factors on Discrimination

The University of Western Australia

^* To whom correspondence should be addressed. E-mail: Stephen.humphry{at}uwa.edu.au.

	Abstract

Discrimination has traditionally been parameterized for items but not other empirical factors. Consequently, if person factors affect discrimination they cause misfit. However, by explicitly formulating the relationship between discrimination and the unit of a metric, it is possible to parameterize discrimination for person groups. This article applies the Rasch model with a person group discrimination parameter to demonstrate the empirical effect of a person group factor on the degree of discrimination. The model is applied to the responses of students in different grades of schooling to a reading test, resulting in improved equating and fit of the data to the model. A simulation study confirms the efficacy of the model and tests of fit. Applied implications are discussed.

First published on September 4, 2009
Educational and Psychological Measurement 2009, doi:10.1177/0013164409344553


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?