Professor Emeritus of Statistics

Ph.D. in Statistics, Purdue University, 1967

Website

Research Interests

• Psychometrics
• Multivariate Assessment

Honors and Appointments

• Education Testing Service project leader
• Fellow, Institute of Mathematical Statistics
• Past President of Psychometric Society

Selected Publications

• D. Monrad,  W. F. Stout,  B. A. Bailey,  J.R. Fryxell,  R.L. Gould,  X. He,  V.R. Plessner,  and L. Roussos (2001). Statistics, the Craft of Data Collection, Description, and Inference (Second Edition). Mobius Communications.
• Stout, William (2001), "Nonparametric item response theory: A maturing and applicable measurement modeling approach'', Applied Psychological Measurement, 25 (3), 300-306
• Zhang, Jinming,  and Stout, William (1999), "Conditional covariance structure of generalized compensatory multidimensional items'', Psychometrika, 64, 129-152.
• Zhang, Jinming,  and Stout, William (1999), "The theoretical detect index of dimensionality and its application to approximate simple structure'', Psychometrika, 64, 213-249.
• Nandakumar, Ratna,  Yu, Feng,  Li, Hsin-Hung,  and Stout, William (1998), "Assessing unidimensionality of polytomous data'', Applied Psychological Measurement, 22, 99-115.
• Zhang, Jinming,  and Stout, William (1997), "On Holland's Dutch Identity Conjecture'', Psychometrika, 62, 375-392.
• Stout, William,  Habing, Brian,  Kim, Hae Rim,  Roussos, Louis,  Zhang, Jinming,  and Douglas, Jeff (1996), "Conditional covariance-based nonparametric multidimensionality assessment'', Applied Psychological Measurement, 20, 331-354.
• Stout, William,  Nandakumar, Ratna,  and Habing, Brian (1996), "Analysis of latent dimensionality of dichotomously and polytomously scored test data'', Behaviormetrika, Journal of the Behaviormetric Society of Japan, 23, 37-65.
• Bolt, Daniel,  and Stout, William (1996), "Differential item functioning: Its multidimensional model and resulting sibtest detection procedure'', Behaviormetrika, Journal of the Behaviormetric Society of Japan, 23, 67-95.
• Douglas, Jeffrey A.,  Stout, William,  and DiBello, Louis V. (1996), "A kernel-smoothed version of SIBTEST with applications to local DIF inference and function estimation'', Journal of Educational and Behavioral Statistics, 21, 333-363.
• Li, Hsin-Hung,  and Stout, William (1996), "A new procedure for detection of crossing DIF'', Psychometrika, 61, 647-677.
• Chang, Hua-Hua,  and Stout, William (1993), "The asymptotic posterior normality of the latent trait in an IRT model'', Psychometrika, 58, 37-52.
• Shealy, Robin,  and Stout, William (1993), "A model-based standardization approach that separates true bias/DIF from group ability differences and detects test bias/DTF as well as item bias/DIF'', Psychometrika, 58, 159-194.
• Stout, William F. (1990), "A new item response theory modeling approach with applications to unidimensionality assessment and ability estimation'', Psychometrika, 55, 293-325.