Achaporn Tantidumrongkul. Comparison of the Efficiency of Logistic Discriminant Function Analysis and Generalized Mantel – Haenszel Procedures for Detecting Differential Item Functioning on Two – Steps Continuous Tests.
The objectives of this research were to study and to compare of the efficiency of
The Logistic Discriminant Function Analysis and Generalized Mantel-Haenszel Procedures on detecting differential item functioning (DIF) based on polytomously scores on two-steps continuous tests for different gender groups. The sample consisted of one thousand and twenty one Mathayom Suksa Two students, consisting of five hundred and eight males and five hundred and thirteen females studying in the semester of the 2016 academic year, in nine schools under the authority of the authority of The Secondary Educational Service Area, Office one The instrument was two steps continuous tests on the congruence of twenty items, difficulty index (p=0.29 – 0.61), discrimination index (r=0.16 – 0.45).
The results were revealed as follows;
The Logistic Discriminant Function Analysis found Differential Item
Functioning (DIF) with four items (3,8,16 and 20)
The Generalized Mantel-Haenszel found Differential Item Functioning (DIF)
with three items (3,8 and 16)
The Logistic Discriminant Function Analysis is more efficient the Generalized
Mantel-Haenszel in terms of detecting differential item functioning in polytomously scored items and the power rate of the Logistic Discriminant Function Analysis 33.33% higher than Generalized Mantel-Haenszel 22.22 % and both of instruments has The Type I error rate in the of Logistic Discriminant Function Analysis, while the Generalized Mantel-Haenszel is 9.09%.