Faculty

Rand WilcoxProfessor of PsychologyContact Information Email: rwilcox@usc.edu Phone: (213) 7402258 Office: SGM 618 LINKS Curriculum Vitae Personal Website 
Education
 B.A. Mathematics, University of California, Santa Barbara
 M.A. Mathematics, University of California, Santa Barbara
 Ph.D. Psychometrics, University of California, Santa Barbara, 1976
 Wilcox, R. R. (2012). Introduction to Robust Estimation and Hypothesis Testing, 3rd Ed. Academic Press.
 Wilcox, R. (2012). Modern Statistics for the Social and Behavioral Sciences: A Practical Introduction. CRC Press.
 Wilcox, R. R. (2010). Fundamentals of Modern Statistical Methods: Substantially Improving Power and Accuracy, Springer, 2nd Ed.
 Wilcox, R. R. (2009). Basics Statistics: Understanding Conventional Methods and Modern Insights. New York: Oxford.
 Wilcox, R. R. (2009). Nonparameric Estimation. (Vol. NA). pp. 153182. Wiley.
 Wilcox, R. R. (2008). Sample size and power. Oxford: Oxford University Press.
 Wilcox, R. R., Keselman, H. (2006). A skipped multivariate measure of location: One and twosample hypothesis testing. pp. p.125138. IAP.
 Wilcox, R. R. (2004). Extension of Hochberg's twostage multiple comparison method. pp. p.371380. New York: Marcel Dekker.
 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.
 Ozdemir, F. (2011). New results on the smallsample properties of some robust univariate estimators. Communications in StatisticsSimulation and Computations.
 Wilcox, R., Tian, T. (2011). Measuring effect size: A robust heteroscedastic approach for two or more groups. Journal of Applied Statistics. Vol. 38, pp. 13591368.
 Victoroff, J., Quoto, S., Adelman, J., Celinska, M., Stern, N., Wilcox, R. (2011). Support for ReligioPolitical Aggression among Teenaged Boys in Gaza: Part II: Neuroendocinological Findings. Aggressive Behavior.
 Carlson, M., Wilcox, R. (2011). Psychometric Properties of ReverseScored Items on the CESD in a Sample of Ethnically Diverse Older Adults. Psycholgical Assessment.
 Wilcox, R. (2011). Comparing two dependent groups: Dealing with missing values. Journal of Data Science.
 Ng, M. (2010). The smallsample efficiency of some recently proposed multivariate measures of location. Journal of Modern and Applied Statistical Methods. Vol. 9, pp. 2842.
 Ng, M., Wilcox, R. (2010). Comparing the slopes of regression lines. British Journal of Mathematical and Statistical Psychology.
 Wilcox, R. (2010). Measuring and detecting associations: Methods based on robust regression estimators that allow curvature. British Journal of Mathematical and Statistical Psychology.
 Tian, T., Wilcox, R., James, G. (2010). Data Reduction in Classification: A Simulated Annealing Based Projection Method. Statistical Analysis and Data Mining.
 Tian, T. (2010). A multivariate adaptive stochastic search method for dimensionality reduction in classification. Annals of Applied Statistics. Vol. 4, pp. 340365.
 Wilcox, R. (2010). Regression: Comparing predictors and groups of predictors based on robust measures of association. Journal of Data Science.
 Ng, M., Wilcox, R. (2010). Bootstrap methods for comparing independent regression slopes. British Journal of Mathematical and Statistical Psychology.
 Wilcox, R. (2010). Regression: Comparing predictors and groups of predictors based on robust measures of association. Journal of Data Science. Vol. 8, pp. 429441.
 Ng, M., Wilcox, R. (2010). Comparing the slopes of regression lines. British Journal of Mathematical and Statistical Psychology. Vol. 63, pp. 319340.
 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.
 Wilcox, R. (2010). Comparing robust nonparametric regression lines via regression depth. Journal of Statistical Computation and Simulation,. Vol. 80, pp. 379387.
 Ng, M., Wilcox, R. R. (2009). Level robust methods based on the least squares regression line. Journal of Modern Applied Statistical Methods/JMASM.
 Wilcox, R. (2009). Comparing robust measures of association estimated via a smoother. Communications in StatisticsSimulation and Computation. Vol. 38, pp. 19691979.
 Wilcox, R. R. (2009). Estimating explanatory power in a simple regression model via smoothers. Journal of Applied Statistics. Vol. NA
 Wilcox, R. (2009). Comparing Pearson correlations: Dealing with heteroscedastiticy and nonnormality. Communications in StatisticsSimulation and Computation. Vol. 38, pp. 22202234.
 Tian, T., James, G., Wilcox, R. (2009). A multivariate adaptive stochastic search method for dimensionality reduction. Annals of Applied Statistics.
 Wilcox, R. (2009). Robust multivariate regression when there is heteroscedasticity. Communications in Statistics} {\em Simulation and Computation,.
 Wilcox, R. (2009). Robust ancova using a smoother with bootstrap bagging. British Journal of Mathematical and Statistical Psychology}. Vol. 62, pp. 427437.
 Wilcox, R. (2009). Robust multivariate regression when there is heteroscedasticity. Communications in StatisticsSimulation and Computation. pp. 113.
 Wilcox, R. R. (2009). Robust ancova using a smoother with bootstrap bagging. British Journal of Mathematical and Statistical Psychology.
 Wilcox, R. (2009). Comparing robust nonparametric regression lines via regression depth. Journal of Statistical Computation and Simulation.
 Wilcox, R. (2008). Regression: Comparing predictors and groups of predictors based on robust measures of association. Journal of Data Science.
 Wilcox, R. R. (2008). Robust principal components: A generalized variance perspective. Behavioral Research Methods. Vol. 40, pp. 102108.
 Wilcox, R. R., Tian, T. (2008). Comparing dependent correlations. Journal of General Psychology. Vol. NA
 Wilcox, R. R. (2008). Some smallsample properties of some recently proposed multivariate outlier detection techniques. Journal of Statistical Computation and Simulation.
 Wilcox, R. (2008). Posthoc analyses in multiple regression based on prediction error. Journal of Applied Statistics.
 Wilcox, R. R. (2008). Quantile regression: A simplified approach to a lackoffit test. Journal of Data Science.
 Wilcox, R. R. (2007). ANCOVA: A robust omnibus test based on selected design points. Journal of Modern Applied Statistical Methods/JMASM. Vol. 5, pp. 1421.
 Wilcox, R. R. (2007). An Omnibus test when using a quantile regression estimator with multiple predictors. Journal of Modern and Applied Statistics.
 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.
 Wilcox, R. R. (2007). Robust ANCOVA: Some smallsample results when there are multiple groups and multiple covariates. Journal of Applied Statistics. Vol. 34, pp. 353364.
 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.
 Keselman, H., Wilcox, R. R. (2007). Adaptive robust estimation and testing. British Journal of Mathematical and Statistical Psychology/British Psychological Society. pp. p. NA.
 Wilcox, R. R. (2006). INFERENCES ABOUT THE COMPONENTS OF A GENERALIZED ADDITIVE MODEL. Journal of Modern Applied Statistical Methods/JMASM. pp. p.NA.
 Mathiyakom, W., Mc NittGray, J. L., Wilcox, R. R. (2006). Regulation of angular impulse during forward translating tasks. Journal of Applied Biomechanics/Human Kinetics. Vol. NA
 Mathiyakom, W., Mc NittGray, 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. 377388.
 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.
 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..
 Wilcox, R. R. (2006). Comparing medians. Computational Statistics & Data Analysis/Elsevier. Vol. 51, pp. 19341943.
 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.
 Wilcox, R. R. (2006). A note on inferences about the median of difference scores. Educational and Psychological Mesasurement/Sage. pp. p. 624630.
 Wilcox, R. R. (2006). CONFIDENCE INTERVALS FOR PREDICTION INTERVALS. Journal of Applied Statistics/Taylor and Francis. pp. p. 317326.
 Wilcox, R. R. (2006). Comparing robust generalized variances and comments on efficiency. Statistical Methodology/Elsevier. pp. p. 211223.
 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.705712.
 Wilcox, R. R. (2006). Pairwise comparisons of dependent groups based on medians. Computational Statistics & Data Analysis/Elsevier. pp. p29332941.
 Smucker, S., Earleywine, M., Wilcox, R. R. (2006). Cannabis, Motivation, and Life Satisfaction. Substance Abuse, Treatment and Policy/NA. pp. p. NA.
 Wilcox, R. R. (2006). Testing the hypothesis of a homoscedastic error term in simple, nonparametric regression. Educational and Psychological Mesasurement/Sage. pp. p. 8592.
 Wilcox, R. R. (2006). Graphical Methods for assessing effect size. Journal of Experimental Education/Heldref. pp. p. 353367.
 Wilcox, R. R. (2006). Some Results on Comparing Quantiles of Dependent Groups. Communications in StatisticsSimulation & Computation/Marcel Dekker. pp. p. in press.
 Wilcox, R. R. (2005). An affine invariant rankbased method for comparing dependent groups. British Journal of Mathematical and Statistical Psychology/British Psychological Society. pp. p. 3342.
 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.495502.
 Wilcox, R. R. (2005). A comparison of six smoothers when there are multiple predictors. Statistical Methodology/Elsevier. pp. p.4957.
 Wilcox, R. R. (2005). Within by Within ANOVA based on medians. Journal of Modern Applied Statistical Methods/JMASM. pp. p.5362.
 Wilcox, R. R. (2005). Comparing medians: An overview plus new results on dealing with heavytailed distributions. Journal of Experimental Education/Heldref. pp. p.249263.
 Wilcox, R. R. (2005). An approach to ANCOVA that allows multiple covariates, nonlinearity and heteroscedasticity. Educational and Psychological Mesasurement/Sage. Vol. 65, pp. 442450..
 Wilcox, R. R. (2005). Depth and a multivariate generalization of the WilcoxonMannWhitney test. American Journal of Mathematical and Management Sciences/American Sciences Press. Vol. 25, pp. 343361.
 Wilcox, R. R. (2004). Some results on extensions and modifications of the TheilSen estimator. British Journal of Mathematical and Statistical Psychology/British Psychological Society. pp. p. 265280.
 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. 215234.
 Wilcox, R. R. (2004). Inferences based on a skipped correlation coefficient. Journal of Applied Statistics/Taylor and Francis. pp. p.131144.
 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. 2738.
 Wilcox, R. R. (2004). Multivariate Location: Robust estimators and inferences. Journal of Modern Applied Statistical Methods/JMASM. pp. p.212.
 Wilcox, R. R. (2004). Kernel density estimators: An approach to understanding how groups differ. Understanding Statistics/Erlbaum. pp. p.333348.
 Wilcox, R. R. (2004). Robust Regression Methods:Achieving small standard errors when there is heteroscedasticity. Understanding Statistics/Erlbaum. pp. p.349364.
 Wilcox, R. R. (2004). An extension of Stein's twostage method to pairwise comparisons among dependent groups based on trimmed means. Sequential Analysis/Marcel Dekker. pp. p. 6374.
 Keselman, H., Othman, A., Wilcox, R. R. (2004). The new and improved twosample t test. Psychological Science/American Psychoologicl Society. pp. p. 4751.
 USC Center for Excellence in Research, fellow, 7/1/20077/1/2010
 Fellow (or Equivalent) of National Society in Discipline, American Psychological Society, 19931994
 Fellow (or Equivalent) of National Society in Discipline, American Psychological Association, 19881989
 T. L. Saaty Award, 1984
 Associate Editor, Communications in StatisticTheory and Methods, 10/01/2006
 Associate Editor, Communications in StatisticsSimulation and Computation, 10/01/2006
 Editorial Board Member, British Journal of Mathematical and Statistical Psychology, 07/01/2002
 Associate Editor, Computational Statistics and Data Analyses, 07/01/1998
 Associate Editor, Psychometrika, 04/01/1983
 Editorial Board Member, American Journal of Mathematical and Management Sciences, 19812011
 Editorial Board, Handbook Series on Computing and Statistics, 11/01/200601/01/2010
 Advisory Board Member, Journal of Experimental Education, 11/01/200601/01/2009
 Guest editor (special issue), Computational Statistics and Data Analyses, 20052006
 Editorial Board Member, Psychological Methods, 20012006
 Editorial Board Member, Journal of Personality and Social Psychology, 19911996
 Editorial Board Member, Journal of Educational Measurement, 19811996
 Editorial Board Member, Applied Psychological Measurement, 19801996
 International Statistical Institute, 03/15/2005
 International Association of Statistical Computing, 05/01/1997
 Association for Psychological Science, 10/01/1989
 British Psychological Society, 02/04/1987
 American Statistical Association, 03/15/1973
 Psychometric Society, 1973
 Institute of Mathematical Statistics, 03/15/197301/01/2011
 Psychological Methods, referee, 20122013
 Behavioral Research Methods, referee, Fall 2011
 Statistical Papers, referee, Fall 2011
 Technometrics, Statistics journal for the physical, chemical, and engineering sciences (referee), Fall 2011
 Behavioral Ecology and Sociobiolgy, Statistical methods, 20102011
 Journal of Neuroscience Methods, quantitative method in neuroscience, 20102011
 Methodology, review, 2009
 Applied Linquistics, Referee, 20062007
 Behavior Research Methods, referee, 20062007
 Journal of Classicificaton, referee, 20062007
 South African Statistics Journal, referee, 20062007
Description of Research
Summary Statement of Research Interests
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
statistics, quantitative methods, robust inferential methods
Publications
Book
Book Chapter
Journal Article
Honors and Awards
Service to the Profession
Editorships and Editorial Boards
Professional Memberships
Reviewer for Publication
 Department of Psychology
 University of Southern California
 SGM 501
 3620 South McClintock Ave.
 Los Angeles, CA 900891061
 Phone: (213) 740  2203
 Email: psychology@dornsife.usc.edu