University of Southern California
USC Dana and David Dornsife College of Letters, Arts and Sciences
Visit USC USC Dornsife HomepageAbout
About
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Rand R WilcoxProfessor of PsychologyContact Information E-mail: rwilcox@usc.edu Phone: (213) 740-2258 Office: SGM 618 LINKS Curriculum Vitae Personal Website |
Education |
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 Ph.D. Psychometrics, University of California, Santa Barbara, 1976
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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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Description of Research |
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Summary Statement of Research Interests |
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| Professor Wilcox's main research interests are statistical methods, particularly robust methods for comparing groups and studying associations. He also collaborates with researchers in occupational therapy, gerontology, biology and psychology | |
Research Keywords |
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| statistics, quantitative methods, robust inferential methods | |
Publications |
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Book |
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Wilcox, R. R.
(2012).
Introduction to Robust Estimation and Hypothesis Testing, 3rd Ed. Academic Press.
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Wilcox, R.
(2012).
Modern Statistics for the Social and Behavioral Sciences: A Practical Introduction. CRC Press.
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Wilcox, R. R.
(2010).
Fundamentals of Modern Statistical Methods: Substantially Improving Power and Accuracy, Springer, 2nd Ed.
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Wilcox, R. R.
(2009).
Basics Statistics: Understanding Conventional Methods and Modern Insights. New York: Oxford.
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Book Chapter |
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Wilcox, R. R.
(2009).
Nonparameric Estimation. (Vol. NA). pp. 153-182. Wiley.
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Wilcox, R. R.
(2008).
Sample size and power. Oxford: Oxford University Press.
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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. IAP.
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Wilcox, R. R.
(2004).
Extension of Hochberg's two-stage multiple comparison method. pp. p.371-380. New York: Marcel Dekker.
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Journal Article |
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Wilcox, R., Keselman, H.
(2011).
Modern regression methods that can substantially increase power and provide a more accurate understanding of associations. European Journal of Personality.
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Ozdemir, F.
(2011).
New results on the small-sample properties of some robust univariate estimators. Communications in Statistics--Simulation and Computations.
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Wilcox, R., Tian, T.
(2011).
Measuring effect size: A robust heteroscedastic approach for two or more groups. Journal of Applied Statistics.
Vol. 38, pp. 1359--1368.
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Victoroff, J., Quoto, S., Adelman, J., Celinska, M., Stern, N., Wilcox, R.
(2011).
Support for Religio-Political Aggression among Teenaged Boys in Gaza: Part II: Neuroendocinological Findings. Aggressive Behavior.
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Carlson, M., Wilcox, R.
(2011).
Psychometric Properties of Reverse-Scored Items on the CES-D in a Sample of Ethnically Diverse Older Adults. Psycholgical Assessment.
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Wilcox, R.
(2011).
Comparing two dependent groups: Dealing with missing values. Journal of Data Science.
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Ng, M.
(2010).
The small-sample efficiency of some recently proposed multivariate measures of location. Journal of Modern and Applied Statistical Methods.
Vol. 9, pp. 28-42.
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Ng, M., Wilcox, R.
(2010).
Comparing the slopes of regression lines. British Journal of Mathematical and Statistical Psychology.
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Wilcox, R.
(2010).
Measuring and detecting associations: Methods based on robust regression estimators that allow curvature. British Journal of Mathematical and Statistical Psychology.
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Tian, T., Wilcox, R., James, G.
(2010).
Data Reduction in Classification: A Simulated Annealing Based Projection Method. Statistical Analysis and Data Mining.
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Tian, T.
(2010).
A multivariate adaptive stochastic search method for dimensionality reduction in classification. Annals of Applied Statistics.
Vol. 4, pp. 340--365.
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Wilcox, R.
(2010).
Regression: Comparing predictors and groups of predictors based on robust measures of association. Journal of Data Science.
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Ng, M., Wilcox, R.
(2010).
Bootstrap methods for comparing independent regression slopes. British Journal of Mathematical and Statistical Psychology.
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Wilcox, R.
(2010).
Regression: Comparing predictors and groups of predictors based on robust measures of association. Journal of Data Science.
Vol. 8, pp. 429-441.
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Ng, M., Wilcox, R.
(2010).
Comparing the slopes of regression lines. British Journal of Mathematical and Statistical Psychology.
Vol. 63, pp. 319-340.
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Clark, F.
(2010).
Effectiveness of a lifestyle intervention in promoting the wellbeing of independently living older people: results of the well elderly 2 randomised controlled trial. Journal of Epidemiology and Community Health.
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Wilcox, R.
(2010).
Comparing robust nonparametric regression lines via regression depth. Journal of Statistical Computation and Simulation,.
Vol. 80, pp. 379-387.
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Ng, M., Wilcox, R. R.
(2009).
Level robust methods based on the least squares regression line. Journal of Modern Applied Statistical Methods/JMASM.
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Wilcox, R.
(2009).
Comparing robust measures of association estimated via a smoother. Communications in Statistics--Simulation and Computation.
Vol. 38, pp. 1969-1979.
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Wilcox, R. R.
(2009).
Estimating explanatory power in a simple regression model via smoothers. Journal of Applied Statistics.
Vol. NA
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Wilcox, R.
(2009).
Comparing Pearson correlations: Dealing with heteroscedastiticy and non-normality. Communications in Statistics--Simulation and Computation.
Vol. 38, pp. 2220-2234.
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Tian, T., James, G., Wilcox, R.
(2009).
A multivariate adaptive stochastic search method for dimensionality reduction. Annals of Applied Statistics.
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Wilcox, R.
(2009).
Robust multivariate regression when there is heteroscedasticity. Communications in Statistics}-- {\em Simulation and Computation,.
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Wilcox, R.
(2009).
Robust ancova using a smoother with bootstrap bagging. British Journal of Mathematical and Statistical Psychology}.
Vol. 62, pp. 427--437.
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Wilcox, R.
(2009).
Robust multivariate regression when there is
heteroscedasticity. Communications in Statistics--Simulation and Computation. pp. 1--13.
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Wilcox, R. R.
(2009).
Robust ancova using a smoother with bootstrap bagging. British Journal of Mathematical and Statistical Psychology.
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Wilcox, R.
(2009).
Comparing robust nonparametric regression lines via regression depth. Journal of Statistical Computation and Simulation.
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Wilcox, R.
(2008).
Regression: Comparing predictors and groups of
predictors based on robust measures of association. Journal of Data Science.
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Wilcox, R. R.
(2008).
Robust principal components: A generalized variance perspective. Behavioral Research Methods.
Vol. 40, pp. 102-108.
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Wilcox, R. R., Tian, T.
(2008).
Comparing dependent correlations. Journal of General Psychology.
Vol. NA
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Wilcox, R. R.
(2008).
Some small-sample properties of some recently proposed multivariate outlier detection techniques. Journal of Statistical Computation and Simulation.
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Wilcox, R.
(2008).
Post-hoc analyses in multiple regression based
on prediction error. Journal of Applied Statistics.
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Wilcox, R. R.
(2008).
Quantile regression: A simplified approach to a lack-of-fit test. Journal of Data Science.
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Wilcox, R. R.
(2007).
ANCOVA: A robust omnibus test based on selected design points. Journal of Modern Applied Statistical Methods/JMASM.
Vol. 5, pp. 14-21.
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Wilcox, R. R.
(2007).
An Omnibus test when using a quantile regression estimator with multiple predictors. Journal of Modern and Applied Statistics.
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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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Keselman, H., Wilcox, R. R.
(2007).
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).
INFERENCES ABOUT THE COMPONENTS OF A GENERALIZED ADDITIVE MODEL. Journal of Modern Applied Statistical Methods/JMASM. 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).
Quantile regression: On Inferences about the slopes corresponding to one, two or three quantiles
. Journal of Modern Applied Statistical Methods/JMASM. pp. p.NA.
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Wilcox, R. R.
(2006).
Inferences about regressioninteractions via a robust smoother with an application to cannabis problems. Journal of Modern Applied Statistical Methods/JMASM.
Vol. 4, pp. 53–62..
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Wilcox, R. R.
(2006).
Comparing medians. Computational Statistics & Data Analysis/Elsevier.
Vol. 51, pp. 1934-1943.
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Kowalchuk, R., Keselman, H., Algina, J., Wilcox, R. R.
(2006).
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).
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).
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).
Testing the hypothesis of a homoscedastic error term in simple, nonparametric regression. Educational and Psychological Mesasurement/Sage. pp. p. 85-92.
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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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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.
(2005).
An approach to ANCOVA that allows multiple covariates, nonlinearity and heteroscedasticity. Educational and Psychological Mesasurement/Sage.
Vol. 65, pp. 442-450..
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Wilcox, R. R.
(2005).
Depth and a multivariate generalization of the Wilcoxon-Mann-Whitney test. American Journal of Mathematical and Management Sciences/American Sciences Press.
Vol. 25, pp. 343-361.
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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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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 Statistic-Theory and Methods, 10/01/2006-
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Associate Editor, Communications in Statistics-Simulation and Computation, 10/01/2006-
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Editorial Board Member, British Journal of Mathematical and Statistical Psychology, 07/01/2002-
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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 Member, American Journal of Mathematical and Management Sciences, 1981-2011
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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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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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Association for Psychological Science, 10/01/1989-
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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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Reviewer for Publication |
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Behavioral Research Methods, referee,
Fall
2011
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Statistical Papers, referee,
Fall
2011
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Technometrics, Statistics journal for the physical, chemical, and engineering sciences (referee),
Fall
2011
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Behavioral Ecology and Sociobiolgy, Statistical methods, 2010-2011
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Journal of Neuroscience Methods, quantitative method in neuroscience, 2010-2011
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Methodology, review, 2009
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Applied Linquistics, Referee, 2006-2007
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Behavior Research Methods, referee, 2006-2007
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Journal of Classicificaton, referee, 2006-2007
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South African Statistics Journal, referee, 2006-2007
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