James A. Wollack

Item Parameter Estimation Under Conditions of Test Speededness: Application of a Mixture Rasch Model With Ordinal Constraints

Daniel M. Bolt, Allan S. Cohen, James A. Wollack · Journal of Educational Measurement · 2002 · 201 citations

Education, Educational Assessment, Educational Measurement +14

A Mixture Item Response Model for Multiple-Choice Data

Daniel M. Bolt, Allan S. Cohen, James A. Wollack · Journal of Educational and Behavioral Statistics · 2001 · 114 citations

Education, Educational Assessment, Psychology +13

An Investigation of the Likelihood Ratio Test For Detection of Differential Item Functioning

Allan S. Cohen, Seock‐Ho Kim, James A. Wollack · Applied Psychological Measurement · 1996 · 102 citations · Full text

Education, Biostatistics, Educational Assessment +14

A Nominal Response Model Approach for Detecting Answer Copying

James A. Wollack · Applied Psychological Measurement · 1997 · 90 citations

Social Sciences, Educational Measurement, Psychology +10

Recovery of Item Parameters in the Nominal Response Model: A Comparison of Marginal Maximum Likelihood Estimation and Markov Chain Monte Carlo Estimation

James A. Wollack, Daniel M. Bolt, Allan S. Cohen et al. · Applied Psychological Measurement · 2002 · 85 citations

Education, Biostatistics, Educational Measurement +17