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1. Using Cochran's Z statistic to test the kernel-smoothed item response function differences between focal and reference groups

Author

Yinggan Zheng, Gierl, Mark J., and Ying Cui

Subjects
Item response theory -- Usage, Kernel functions -- Usage, Simulation methods -- Methods, Education, Psychology and mental health
Abstract

A study uses the Cochran' s Z nonparametric differential item functioning statistic to test the difference between the kernel-smoothed item response functions for reference and focal groups. Results indicate that the Type I error and power performance of CochranEs Z statistic improves when kernel smoothing is applied.

Published
2010

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