科研之友
微信
新浪微博
Facebook
分享链接
摘要
This study combined the kernel smoothing procedure and a nonparametric differential item functioning statistic-Cochran's Z-to statistically test the difference between the kernel-smoothed item response functions for reference and focal groups. Simulation studies were conducted to investigate the Type I error and power of the proposed kernel-smoothed Cochran's Z. For the purpose of comparison, the Type I error and power rates with no correction and with regression correction were also include in the simulation. The results of this study suggest the Type I error and power performance of Cochran's Z improved when kernel smoothing was applied.
- 出版日期2010-8
