An Investigation of Ordering Test Items Differently Depending on Their Difficulty Level by Differential Item Functioning

Balta E., SÜNBÜL S. Ö.

EURASIAN JOURNAL OF EDUCATIONAL RESEARCH, vol.2017, no.72, pp.23-43, 2017 (ESCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2017 Issue: 72
  • Publication Date: 2017
  • Doi Number: 10.14689/ejer.2017.72.2
  • Journal Name: EURASIAN JOURNAL OF EDUCATIONAL RESEARCH
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.23-43
  • Keywords: Item Orderings, Mantel-Haenszel, Logistic Regression, Moodle, PERFORMANCE, CONTEXT, DIF, ARRANGEMENT, LOCATION, BIAS, SEX
  • Ankara University Affiliated: Yes

Abstract

Purpose : Position effects may influence examinees' test performances in several ways and trigger other psychometric issues, such as Differential Item Functioning (DIF). This study aims to supply test forms in which items in the test are ordered differently, depending on their difficulty level (from easy to difficult or difficult to easy), to determine whether the items in the test form result in DIF and whether a consistency exists between the methods for detecting DIF. Research Methods: Methods of Mantel Haenszel (MH) and Logistic Regression (LR) have been taken into consideration to identify whether the items in the tests involve DIF.