I am Associate Professor in the Department of Statistics at the National Chengchi University. After receiving a Ph.D. degree in Statistics at the National Tsing-Hua University, I have been a postdoc researcher in the Department of Statistics at the University of Illinois at Urbana-Champaign and the University of Michigan and have been an Assistant Professor in the Department of Statistics at the Feng Chia University. 

Education:

• Ph. D., Statistics, National Tsing-Hua University, 2014

• M. S., Statistics, National Tsing-Hua University, 2009

• B. S., Applied Mathematics, National Chiao-Tung University, 2007

Employment:

02/01/2025 - current: Associate Professor, Department of Statistics, National Chengchi University

08/01/2021 - 01/31/2025: Assistant Professor, Department of Statistics, National Chengchi University

Publications:

1.  Y.-W. Chang*, R. Tsai and N.-J. Hsu.  A Speeded Item Response Model: Leave the Harder Till Later.  Psychometrika, 255-274, 2014.    typo  &  coding tips

2.  Y.-W. Chang, W.-K. Huang and R. Tsai.  DIF Detection Using Multiple-Group Categorical CFA with Minimum Free Baseline Approach.  Journal of Educational Measurement, 181-199, 2015.

3.  C.-Y. Hong, Y.-W. Chang and R. Tsai.  Estimation of Generalized DINA Model with Order Restrictions.  Journal of Classification, 460-484, 2016.

4.  Y.-W. Chang, N.-J. Hsu and R. Tsai.  Unifying Differential Item Functioning in Factor Analysis for Categorical Data Under a Discretization of a Normal Variant.  Psychometrika, 382-406, 2017.

5.  Y.-W. Chang*, N.-J. Hsu and R. Tsai.  An Item Response Tree Model with Not-All-Distinct End Nodes for Non-Response Modeling.  British Journal of Mathematical and Statistical Psychology, 487-512, 2021.

6.  Y.-W. Chang* and J.-Y. Tu.  Bayesian estimation for an item response tree model for nonresponse modeling.  Metrika, 1023–1047, 2022.

7. Y.-W. Chang* and C.-X. Yang.  Bayesian Inference with Spike-and-Slab Priors for Differential Item Functioning Detection in a Multiple-Group IRT Tree Model. Journal of Statistical Computation and Simulation, 94(7), 2024.

8. C.-Y. Chen and Y.-W. Chang*. Missing Data Imputation using Classification and Regression Trees. PeerJ Computer Science, Accepted, 2024.05.

(*: corresponding author)

Honors:

Excellent Teaching Awards, Feng Chia University, November, 2020.
(逢甲大學109學年度教學績優教師 )

Research Interests:

• Statistical Inference

• Bayesian Analysis

• Factor Analysis

• Time Series Analysis

• Item Response Theory Models

• Structural Equation Modeling

Prospective Students

I am currently recruiting highly motivated and hard-working master students. My research focuses on developing new statistical methods for categorical data. After training for your master thesis, students are expected to have solid programming skills and better understandings in both statistics and computational statistics. If you are interested in my research, feel free to contact me in email.

Prospective Students (in Chinese)

目前誠徵政大統計碩士班且願意認真投入論文的研究生，將開始面談2025年入學的新生。我目前的研究聚焦在對於類別型資料發展新的統計方法。透過碩士論文的訓練，學生將會在程式能力與對於統計與計算統計的認識有明顯地進步。歡迎有興趣的同學用email與我聯繫。