This study aimed at examining the issues affecting the use of IRT models in investigating differential item functioning in high stakes testing. It specifically focused on the Iranian National University Entrance Exam (INUEE) Special English Subtest. A sample of 200,000 participants was randomly selected from the candidates taking part in the INUEE 2003 and 2004 respectively. The data collected ...

Many constructs are measured using multi-item data collection instruments. Differential item functioning (DIF) occurs when construct-irrelevant covariates interfere with the relationship between construct levels and item responses. DIF assessment is an active area of research, and several techniques are available to identify and account for DIF in cross-sectional settings. Many studies include ...

The authors examined measurement bias in the Hogan Personality Inventory by investigating differential item functioning (DIF) across sex and two racial groups (Caucasian and Black). The sample consisted of 1,579 Caucasians (1,023 men, 556 women) and 523 Blacks (321 men, 202 women) who were applying for entry-level, unskilled jobs in factories. Although the group mean differences were trivial, m...

The current study aimed to examine differential item functioning (DIF) of a numerical ability test for Gulf state school students. This examined the DIF items by gender and country using two analysis methods; Likelihood Ratio Test (LRT) Mantel-Haenszel (MH). sample size was 2689 individuals throughout grades 5 6, researchers used MH with SPSS LRT BILOG-MG. classification stability coefficient k...

Background and aims The nine-item Internet Gaming Disorder Scale - Short Form (IGDS-SF9) is brief and effective to evaluate Internet Gaming Disorder (IGD) severity. Although its scores show promising psychometric properties, less is known about whether different groups of gamers interpret the items similarly. This study aimed to verify the construct validity of the Persian IGDS-SF9 and examine ...

OBJECTIVE Education is expected to have an effect on differential item functioning (DIF) on the 15-item Modified Boston Naming Test in the Korean version of the Consortium to Establish a Registry for Alzheimer's Disease Assessment Packet (BNT-KC). However, no study has examined DIF in the BNT-KC. METHODS We used the item response theory to investigate the impact of education on the DIF in the...

ObjectiveThe objective is to examine whether one of the most used instruments for measuring attitudes towards caring dying patients, Frommelt Attitude Toward Care Dying (FATCOD-B) instrument, has same meaning across different societal contexts, as exemplified by Swedish and Saudi Arabian intensive care professionals.MethodsA cross-sectional design 30-item FATCOD-B questionnaire. It was distribu...

An important step in scale development and assessment is to evaluate differential item functioning (DIF) across segments of the population. Recent approaches use lasso regularization simultaneously detect DIF all items avoid incorrect anchor assumptions that incur inflated error rates for classical evaluation methods. Although promising, methods cause underestimated standard errors p-values. al...

The presence of differential item functioning (DIF) in a test suggests bias that could disadvantage members of a certain group. Previous work with tests of visual learning abilities found significant DIF related to age groups in a car test (Lee, Cho, McGugin, Van Gulick, & Gauthier, 2015), but not in a face test (Cho et al., 2015). The presence of age DIF is a threat to the validity of the test...

This study aims to compare the Wald test and likelihood ratio (LRT) approaches with Classical Test Theory (CTT) Item Response (IRT) based differential item functioning (DIF) detection methods in context of cognitive diagnostic models (CDMs), using TIMSS 2011 dataset as a retrofitting study. CDMs, which have significant potential when determining DIF their contribution validity, can give confide...