Multiple, correlated covariates associated with differential item functioning (DIF): Accounting for language DIF when education levels differ across languages

A Comparison of Methods for Estimating Conditional Item Score Difference in Differential Item Functioning (DIF) Assessments

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...

Differential item functioning (DIF) analyses of health-related quality of life instruments using logistic regression

BACKGROUND Differential item functioning (DIF) methods can be used to determine whether different subgroups respond differently to particular items within a health-related quality of life (HRQoL) subscale, after allowing for overall subgroup differences in that scale. This article reviews issues that arise when testing for DIF in HRQoL instruments. We focus on logistic regression methods, which...

A Differential Item Functioning (DIF) Analysis of the Self-Report Psychopathy Scale

Differential item functioning (DIF) occurs when an item is influenced by a variable irrelevant to the construct of interest. Recent investigations of DIF in the Psychopathy Checklist-Revised (PCL-R) indicated that several PCL-R items demonstrated significant DIF. These findings spurred the current investigation of DIF in a measure of subclinical psychopathy closely tied to the PCL-R, namely a 4...

Differential Item Functioning (DIF) in Terms of Gender in the Reading Comprehension Subtest of a High-Stakes Test

Validation is an important enterprise especially when a test is a high stakes one. Demographic variables like gender and field of study can affect test results and interpretations. Differential Item Functioning (DIF) is a way to make sure that a test does not favor one group of test takers over the others. This study investigated DIF in terms of gender in the reading comprehension subtest (35 i...