The Applicability of Item Response Theory Based Statistics to Detect Differential Item Functioning in Polytomous Tests

A comparison of discriminant logistic regression and Item Response Theory Likelihood-Ratio Tests for Differential Item Functioning (IRTLRDIF) in polytomous short tests.

BACKGROUND Short scales are typically used in the social, behavioural and health sciences. This is relevant since test length can influence whether items showing DIF are correctly flagged. This paper compares the relative effectiveness of discriminant logistic regression (DLR) and IRTLRDIF for detecting DIF in polytomous short tests. METHOD A simulation study was designed. Test length, sample...

Gender bias in the sixteen-item Anxiety Sensitivity Index: an application of polytomous differential item functioning.

Gender differences in measures of anxiety sensitivity (AS) are similar to gender differences across anxiety disorders; females exhibit higher levels of AS and a greater prevalence of anxiety disorders than males. The current study confirms higher scores on the Anxiety Sensitivity Index (ASI) in females. Further analysis reveals, however, that gender differences on the ASI may arise from a singl...

an exploratory study of differential item functioning (dif) in efl reading comprehension

بررسی دلایل عملکرد متفاوت سوالات آزمون درک مطلب به زبان خارجی تاریخچه ی تحقیق درباره ی منابع عملکرد مختلف سوالات (دیف) در آزمون درک مطلب پر است از مجموعه ای از متغیرهای فرضیه ای که چند مورد از مهمترین آنها عبارتند از: جنسیت، آشنایی با موضوع متن، علاقه به موضوع یا محتوای متن، حدس زدن، و عوامل بافت اجتماعی (پی 2004؛ زومبو و گلین 2005). مطالعه حاضر با استناد به فلسفه ی انکارپذیری پوپر عوامل ذکر...

9. Differential Item Functioning In Licensure Tests

Multiple Ways to Detect Differential Item Functioning in SAS

Differential item functioning (DIF), as an assessment tool, has been widely used in quantitative psychology, educational measurement, business management, and insurance and healthcare industries. The purpose of DIF analyses is to detect response differences of items in questionnaires, rating scales, or tests across different subgroups (e.g., gender), while controlling for ability level. There a...