IDENTIFYING DIFFERENTIAL ITEM FUNCTION (DIF) BASED ON ITEM-RESPONSE THEORY: APPLICATION OF THE ONE PARAMETER MODEL USING THE BILOG MG SOFTWARE

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EZANLOO B.; HABIBI ASGARABADI M.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Applied Psychology Year:2010 | Volume:4 | Issue:2 (14) Page(s): 20-31

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Title

IDENTIFYING DIFFERENTIAL ITEM FUNCTION (DIF) BASED ON ITEM-RESPONSE THEORY: APPLICATION OF THE ONE PARAMETER MODEL USING THE BILOG MG SOFTWARE

Author(s)

EZANLOO B. | HABIBI ASGARABADI M. | Issue Writer Certificate

Keywords

BILOG-MG SOFTWAREQ3

DIFFERENTIAL ITEM FUNCTIONSQ3

ITEM RESPONSE THEORYQ3

ONE PARAMETER MODELQ2

Abstract

Aim: The aim of the present paper was to describe and explain the method of differential item function (DIF) within the framework of the ITEM RESPONSE THEORY (IRT) using the ONE PARAMETER MODEL with an emphasis on internal answer bias to the test.Method: As a first step, the theoretical foundations of the perspective was introduced and then in order to offer a practical application of the method, items of the English grammar subscale of the foreign language booklet in the National University Entrance Exam (NUEM) in the academic year 2005–06 was analyzed by two methods of comparing levels of difficulty values in two groups and likelihood ratio test. This was done by using BILOGMG software under the ONE PARAMETER MODEL.Results: Findings showed there was a significant difference in the amount of difficulty coefficient between the two groups on question number 8. This was confirmed by the fact that there was a better fitness when using the model including DIF compared with the model without DIF (p<0.05). In fact the probability of a correct response was higher for males than for females.Conclusion: The importance of investigating DIF in different tests is becoming increasingly important The methods for investigating DIF in classical test theory are not useful due to the variability in the indices obtained by this method. In contrast, techniques under the IRT context seem more plausible.

Cites

THE CLASSICAL AND MODERN THEORIES OF MEASUREMENT IN BEHAVIORAL SCIENCE AND MEDICINE: A REVIEW ON THE METHODOLOGICAL PROPERTIES, BENEFITS AND LIMITATIONS

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APA: Copy

EZANLOO, B., & HABIBI ASGARABADI, M.. (2010). IDENTIFYING DIFFERENTIAL ITEM FUNCTION (DIF) BASED ON ITEM-RESPONSE THEORY: APPLICATION OF THE ONE PARAMETER MODEL USING THE BILOG MG SOFTWARE. JOURNAL OF APPLIED PSYCHOLOGY, 4(2 (14)), 20-31. SID. https://sid.ir/paper/151774/en

Vancouver: Copy

EZANLOO B., HABIBI ASGARABADI M.. IDENTIFYING DIFFERENTIAL ITEM FUNCTION (DIF) BASED ON ITEM-RESPONSE THEORY: APPLICATION OF THE ONE PARAMETER MODEL USING THE BILOG MG SOFTWARE. JOURNAL OF APPLIED PSYCHOLOGY[Internet]. 2010;4(2 (14)):20-31. Available from: https://sid.ir/paper/151774/en

IEEE: Copy

B. EZANLOO, and M. HABIBI ASGARABADI, “IDENTIFYING DIFFERENTIAL ITEM FUNCTION (DIF) BASED ON ITEM-RESPONSE THEORY: APPLICATION OF THE ONE PARAMETER MODEL USING THE BILOG MG SOFTWARE,” JOURNAL OF APPLIED PSYCHOLOGY, vol. 4, no. 2 (14), pp. 20–31, 2010, [Online]. Available: https://sid.ir/paper/151774/en

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