Guanlan Xu

Guanlan Xu

Associate Research Scientist at Pearson

Publications

Book Chapter: Item Response Theory

Published in International Encyclopedia of Education (Fourth Edition)., 2022

This article provides a broad overview of item response theory (IRT)

Recommended citation: Chapter Ackerman, A., Ma, Y., Ma, M., Pacico, J. C., Wang, Y., Xu, G., Ye, T.,Zhang, J., Zheng, M. (2022). Item Response Theory. In Editor R. J. Tierney, F. Rizvi, K. Ercikan. (Ed.) International Encyclopedia of Education (Fourth Edition, 72-85). Elsevier. https://doi.org/10.1016/B978-0-12-818630-5.10010-7

Expanding Bifactor Models of Psychological Traits to Account for Multiple Sources of Measurement Error

Published in Psychological Assessment, 2022

We demonstrate how multi-occasion bifactor models can be used to gauge effects of multiple sources of measurement error, revise measures to reduce such error, improve model fit, assess dimensionality and viability of scale scores, and interpret results from both factor analytic and generalizability theory perspectives.

Recommended citation: Vispoel, W. P., Lee, H., Xu, G., & Hong, H. (2022). Expanding bifactor models of psychological traits to account for multiple sources of measurement error. Psychological Assessment.

Integrating Bifactor Models into a Generalizability Theory Based Structural Equation Modeling Framework

Published in The Journal of Experimental Education, 2022

This paper talks about the connections between the Bifactor model and the Generalizability Theory (GT)

Recommended citation: Walter P. Vispoel, Hyeryung Lee, Guanlan Xu & Hyeri Hong (2022) Integrating Bifactor Models into a Generalizability Theory Based Structural Equation Modeling Framework, The Journal of Experimental Education, DOI: 10.1080/00220973.2022.2092833

Interrelationships between latent state-trait theory and generalizability theory within a structural equation modeling framework

Published in Psychological Methods, 2021

This paper talks about the connections between the Latent State-trait theory (LST) and the Generalizability Theory (GT)

Recommended citation: Vispoel, W. P., Xu, G., & Schneider, W. S. (2021). Interrelationships between latent state-trait theory and generalizability theory within a structural equation modeling framework. Psychological Methods. Advance online publication. https://doi.org/10.1037/met0000290