A Power Formula for the SIBTEST Procedure for Differential Item Functioning-Reference-Cited by-同舟云学术

A Power Formula for the SIBTEST Procedure for Differential Item Functioning

Published:2014-02-24 Issue:4 Volume:38 Page:311-328
ISSN:0146-6216
Container-title:Applied Psychological Measurement
language:en
Short-container-title:Applied Psychological Measurement

Author:

Li Zhushan¹

Affiliation:

1. Boston College, Chestnut Hill, MA, USA

Abstract

A power formula for the SIBTEST procedure for differential item functioning (DIF) is derived. The power of SIBTEST is related to the item response function (IRF) for the studied item, the latent trait distributions and the sample sizes for the reference and focal groups, and the proportion of each group in the sample. Based on the power formula, a method for calculating the sample size for a desired power level is presented. Monte Carlo simulation studies show that the theoretical values calculated from the formulas derived in the article are close to what are observed in the simulated data.

Publisher

SAGE Publications

Subject

Psychology (miscellaneous),Social Sciences (miscellaneous)

Link

http://journals.sagepub.com/doi/pdf/10.1177/0146621613518095

Reference20 articles.

1. A SIBTEST Approach to Testing DIF Hypotheses Using Experimentally Designed Test Items

2. Detecting DIF for Polytomously Scored Items: An Adaptation of the SIBTEST Procedure

3. Type I Error Inflation for Detecting DIF in the Presence of Impact

4. DEMONSTRATING THE UTILITY OF THE STANDARDIZATION APPROACH TO ASSESSING UNEXPECTED DIFFERENTIAL ITEM PERFORMANCE ON THE SCHOLASTIC APTITUDE TEST

5. Performance of SIBTEST When the Percentage of DIF Items is Large

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