Education
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 B.A. Mathematics, University of California, Santa Barbara
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M.A. Mathematics, University of California, Santa Barbara
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Ph.D. Psychometrics and Statistics, University of California, Santa Barbara, 1976
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Description of Research
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Summary Statement of Research Interests
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Professor Wilcox researches statistics and quantitative methods. He gives specific focus to inferential methods, particularly robust techniques for comparing groups and studying how variables are related.
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Publications
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Book
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Wilcox, R. R.
(2005).
Introduction to Robust Estimation and
Hypothesis Testing, 2nd Ed. Introduction to Robust Estimation and
Hypothesis Testing, 2nd Ed./Academic Press.
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Book Chapter
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Wilcox, R. R., Keselman, H.
(2006).
A skipped multivariate measure of location: One- and two-sample hypothesis testing. pp. p.125-138. A skipped multivariate measure of location: One- and two-sample hypothesis testing.
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Wilcox, R. R.
(2004).
Extension of Hochberg's two-stage multiple comparison method. pp. p.371-380. New York: Extension of Hochberg's two-stage multiple comparison method/Marcel Dekker.
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Wilcox, R. R.
(2006).
Sample size and power. pp. p.. Oxford: Sample size and power/Oxford University Press.
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Journal Article
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Wilcox, R. R.
(2007).
Robust principal components: A generalized variance perspective. Behavioral Research Methods.
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Wilcox, R. R.
(2007).
Local measures of association: Estimating the derivative of the regression line. British Journal of Mathematical and Statistical Psychology/British Psychological Society. pp. p. NA.
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Wilcox, R. R.
(2007).
Robust ANCOVA: Some small-sample results when there are multiple groups and multiple covariates. Journal of Applied Statistics.
Vol. 34, pp. 353--364.
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Fournier, B., Rupin, N., Bigerelle, M., Najjar, D., Iost, A., Wilcox, R. R.
(2007).
Estimating the parameters of a generalized lambda distribution. Computational Statistics & Data Analysis/Elsevier. pp. p.NA.
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Mathiyakom, W., Mc Nitt-Gray, J. L., Wilcox, R. R.
(2006).
Regulation of angular impulse during forward translating tasks. Journal of Applied Biomechanics/Human Kinetics.
Vol. NA
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Mathiyakom, W., Mc Nitt-Gray, J. L., Wilcox, R. R.
(2006).
Lower extremity control and dynamics during backward angular impulse generation in backward translating tasks,. Experimental Brain Research.
Vol. 169, pp. 377-388.
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Wilcox, R. R.
(2006).
Comparing medians. Computational Statistics & Data Analysis/Elsevier.
Vol. 51, pp. 1934-1943.
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Wilcox, R. R.
(2006).
A note on inferences about the median of difference scores. Educational and Psychological Mesasurement/Sage. pp. p. 624-630.
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Wilcox, R. R.
(2006).
Testing the hypothesis of a homoscedastic errorterm in simple, nonparametric regression. Educational and Psychological Mesasurement/Sage. pp. p. 85-92.
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Wilcox, R. R.
(2006).
CONFIDENCE INTERVALS FOR PREDICTION INTERVALS. Journal of Applied Statistics/Taylor and Francis. pp. p. 317-326.
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Wilcox, R. R.
(2006).
Comparing robust generalized variances and comments on efficiency. Statistical Methodology/Elsevier. pp. p. 211-223.
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Wilcox, R. R.
(2006).
Detecting heteroscedasticity in a simple regression model via quantile regression slopes. Journal of Statistical Computation and Simulation/Taylor and Francis. pp. p.705-712.
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Wilcox, R. R.
(2006).
Pairwise comparisons of dependent groups based on medians. Computational Statistics & Data Analysis/Elsevier. pp. p2933-2941.
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Smucker, S., Earleywine, M., Wilcox, R. R.
(2006).
Cannabis, Motivation, and Life Satisfaction. Substance Abuse, Treatment and Policy/NA. pp. p. NA.
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Wilcox, R. R.
(2006).
Graphical Methods for assessing effect size. Journal of Experimental Education/Heldref. pp. p. 353-367.
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Wilcox, R. R.
(2006).
Some Results on Comparing Quantiles of Dependent Groups. Communications in Statistics-Simulation & Computation/Marcel Dekker. pp. p. in press.
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Mathiyakom, W., Mc Nitt-Gray, J. L., Wilcox, R. R.
(2006).
Lower extremity control and dynamics during backward angular impulse generation in forward translating tasks. Journal of Biomechanics/Elsevier.
Vol. 39(6), pp. 990-1000.
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Wilcox, R. R.
(2005).
A MULTIVARIATE GENERALIZATION OF THE WILCOXON-MANN-WHITNEY TEST. American Journal of Mathematical and Management Sciences/American Sciences Press. pp. 343-364.
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Wilcox, R. R.
(2005).
An affine invariant rank-based method for comparing dependent groups. British Journal of Mathematical and Statistical Psychology/British Psychological Society. pp. p. 33--42.
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Wilcox, R. R.
(2005).
Estimating the conditional variance of Y, given X, in a simple regression model. Journal of Applied Statistics/Taylor and Francis. pp. p.495--502.
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Wilcox, R. R.
(2005).
A comparison of six smoothers when there are multiple predictors. Statistical Methodology/Elsevier. pp. p.49--57.
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Wilcox, R. R.
(2005).
Within by Within ANOVA based on medians. Journal of Modern Applied Statistical Methods/JMASM. pp. p.53--62.
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Wilcox, R. R.
(2005).
Comparing medians: An overview plus new results on dealing with heavy-tailed distributions. Journal of Experimental Education/Heldref. pp. p.249--263.
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Wilcox, R. R.
(2004).
Some results on extensions and modifications
of the Theil-Sen estimator. British Journal of Mathematical and Statistical Psychology/British Psychological Society. pp. p. 265--280.
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Othman, A., Wilcox, R. R.
(2004).
Comparing measures of the ``typical' score across treatment groups. British Journal of Mathematical and Statistical Psychology/British Psychological Society. pp. p. 215--234.
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Wilcox, R. R.
(2004).
Inferences based on a skipped correlation
coefficient. Journal of Applied Statistics/Taylor and Francis. pp. p.131--144.
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Keselman, H., Wilcox, R. R.
(2004).
A power comparison of robust test statistics based on adaptive estimators. Journal of Modern Applied Statistical Methods/JMASM. pp. p. 27-38.
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Wilcox, R. R.
(2004).
Multivariate Location: Robust estimators and inferences. Journal of Modern Applied Statistical Methods/JMASM. pp. p.2--12.
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Wilcox, R. R.
(2004).
Kernel density estimators: An approach to understanding how groups differ. Understanding Statistics/Erlbaum. pp. p.333-348.
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Wilcox, R. R.
(2004).
Robust Regression Methods:Achieving small standard errors when there is heteroscedasticity. Understanding Statistics/Erlbaum. pp. p.349--364.
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Wilcox, R. R.
(2004).
An extension of Stein's two-stage method to pairwise comparisons among dependent groups based on trimmed means. Sequential Analysis/Marcel Dekker. pp. p. 63--74.
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Keselman, H., Othman, A., Wilcox, R. R.
(2004).
The new and improved two-sample t test. Psychological Science/American Psychoologicl Society. pp. p. 47-51.
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Keselman, H., Wilcox, R. R.
(2005).
Adaptive robust estimation and testing. British Journal of Mathematical and Statistical Psychology/British Psychological Society. pp. p. NA.
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Wilcox, R. R.
(2006).
Robust ANCOVA: some small-sample results when there are multiple groups and multiple covariates. Journal of Applied Statistics/Taylor and Francis. pp. p.NA.
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Wilcox, R. R.
(2004).
ANCOVA: A robust omnibus test based on selected design points. Journal of Modern Applied Statistical Methods/JMASM. pp. p. NA.
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Wilcox, R. R.
(2005).
INFERENCES ABOUT THE COMPONENTS OF A GENERALIZED ADDITIVE MODEL. Journal of Modern Applied Statistical Methods/JMASM. pp. p.NA.
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Kowalchuk, R., Keselman, H., Algina, J., Wilcox, R. R.
(2005).
Multiple Comparison Procedures, Trimmed Means and Transformed Statistics. Journal of Modern Applied Statistical Methods/JMASM. pp. p. NA.
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Wilcox, R. R.
(2006).
Quantile regression. Journal of Modern Applied Statistical Methods/JMASM. pp. p.NA.
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Honors and Awards
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USC Center for Excellence in Research, fellow, 7/1/2007-7/1/2010
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Fellow (or Equivalent) of National Society in Discipline, American Psychological Society, 1993-1994
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Fellow (or Equivalent) of National Society in Discipline, American Psychological Association, 1988-1989
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T. L. Saaty Award, 1984
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Service to the Profession
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Editorships and Editorial Boards
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Associate Editor, Communications in Statistics, 10/01/2006-
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Associate Editor, Computational Statistics and Data Analyses, 07/01/1998-
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Associate Editor, Psychometrika, 04/01/1983-
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Editorial Board, Handbook Series on Computing and Statistics, 11/01/2006-01/01/2010
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Advisory Board Member, Journal of Experimental Education, 11/01/2006-01/01/2009
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Editorial Board Member, British Journal of Mathematical and Statistical Psychology, 07/01/2002-12/31/2007
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Editorial Board Member, American Journal of Mathematical and Management Sciences, 1981-2007
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Guest editor (special issue), Computational Statistics and Data Analyses, 2005-2006
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Editorial Board Member, Psychological Methods, 2001-2006
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Editorial Board Member, Journal of Personality and Social Psychology, 1991-1996
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Editorial Board Member, Journal of Educational Measurement, 1981-1996
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Editorial Board Member, Applied Psychological Measurement, 1980-1996
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Professional Memberships
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International Statistical Institute, 03/15/2005-
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International Association of Statistical Computing, 05/01/1997-
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American Psychological Society, 10/01/1989-
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Royal Statistical Society, 04/06/1988-
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British Psychological Society, 02/04/1987-
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American Statistical Association, 03/15/1973-
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Institute of Mathematical Statistics, 03/15/1973-
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Psychometric Society, 1973-
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