http://nd.psychstat.org/ 2012-05-09T12:59:15-04:00 http://nd.psychstat.org/ http://nd.psychstat.org/lib/images/favicon.ico text/html 2012-02-06T16:32:42-04:00 http://nd.psychstat.org/research/bayesian_methods Bayesian in press Bayes Offers a 'New' Way to Make Sense of Numbers Adding Art to the Rigor Of Statistical Science text/html 2011-08-26T15:44:39-04:00 http://nd.psychstat.org/research/cite-bauw Article citing BAUW * Zhang, Z., Hamagami, F., Wang, L., Grimm, K. J., & Nesselroade, J. R. (2007). Bayesian analysis of longitudinal data using growth curve models. International Journal of Behavioral Development, 31(4), 374-383. * Common polymorphisms in the folate pathway predict efficacy of combination regimens containing methotrexate and sulfasalazine in early rheumatoid arthritis. Heather M James, David Gillis, Pravin Hissaria, Susan Lester, Andrew A Somogyi, Leslie G Cleland, and Sus… text/html 2011-08-26T15:44:39-04:00 http://nd.psychstat.org/research/grm Mplus scripts for estimating the quadratic growth rate models text/html 2012-03-06T10:36:07-04:00 http://nd.psychstat.org/research/index Lab for Developmental and Health Research Methodology Overview of our research Our lab aims to develop and apply statistical methods in the areas of developmental and health research. Current Members * Peggy Wang * Johnny Zhang * Xin (Cynthia) Tong * Qian (Jackie) Zhang text/html 2012-05-08T09:22:55-04:00 http://nd.psychstat.org/research/johnny_zhang Research interests Methodologically, my research interests include (1) continuous and categorical dynamic factor models and nonlinear time series models, (2) linear and nonlinear models for analyzing longitudinal data, (3) dynamical systems analysis, and (4) Bayesian methods and statistical computing. From a substantive perspective, I am interested in the analysis of intraindividual change and interindividual differences in change of life span development, cognitive aging, and emotion. text/html 2010-08-27T10:03:30-04:00 http://nd.psychstat.org/research/lab Lab for Developmental and Health Research Methodology Overview of our research Our lab aims to develop and apply statistical methods in the areas of developmental and health research. Current Members * Peggy Wang * Johnny Zhang * Xin (Cynthia) Tong * Qian (Jackie) Zhang * Zhe (Jesse) Wang text/html 2011-05-19T17:20:00-04:00 http://nd.psychstat.org/research/luzhanglubke2010 Supplementary materials for Lu, Zhang, & Lubke (2011) OpenBUGS codes for real data analysis * MNAR analysis ############################################## ## GMM with non-ignorable missingdata ## ############################################## model { ######################## ## model ######################## for( i in 1:N ) { # --------- Model the latent mixture, parameter: lambda.--------- z[i] ~ dcat(lambda[i… text/html 2009-02-05T11:12:15-04:00 http://nd.psychstat.org/research/peggy_wang Research interests Lijuan Peggy Wang's research interests are in the areas of longitudinal data analysis and mixed-effects modeling. She is also interested in psychological and educational measurement. Her current research project involves developing and applying models for multivariate nonnormal data such as longitudinal ceiling data and multivariate zero-inflated count data.