文章基本信息

标题：Differential Item Functioning: Implications for Test Validation
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作者：Salehi, Mohammad ; Tayebi, Alireza
期刊名称：Journal of Language Teaching and Research
印刷版ISSN：1798-4769
出版年度：2012
卷号：3
期号：1
页码：84-92
DOI：10.4304/jltr.3.1.84-92
语种：English
出版社：Academy Publisher
摘要：This paper attempts to recapitulate the concept of validity, namely construct validity (i.e., its definition and its approaches and role in language testing and assessment). Validation process is then elaborated on and proved to be integral enterprise in the process of making tests, namely English language proficiency tests. Then come the related concept of test fairness and test bias and its sources (e.g., gender, field of study, age, nationality and L1, background knowledge, etc) and contributions and threads to the validity of tests in general and in high-stakes tests of English language proficiency in particular. Moreover, in the present study, different approaches to investigate the validity of tests will be reviewed. Differential Item Functioning (DIF), among the other methods to investigate the validity of tests is also explained along with the description and explanation of its different detection methods and approaches mentioning their advantages and disadvantages to conclude that logistic regression (LR) is among the best methods till now.
关键词：validity;Differential Item Functioning;item bias;test fairness;logistic regression;IRT