Education

Ph.D., Michigan State University

Research

Xiaofeng (Steven) Liu's research specializes in statistical power analysis, hierarchical linear modeling, statistical programming, and educational policy studies.

Expertise

Applied statistics

Biography

Xiaofeng (Steven) Liu is a Professor at the University of South Carolina. He received his Ph.D. from Michigan State University and did his postdoctoral study at the University of Michigan. He specializes in statistical power analysis, hierarchical linear modeling, statistical programming, and educational policy studies.

Selected publications

Liu, X. (2013). Statistical Power Analysis for the Social and Behavioral Sciences: Basic and Advanced Techniques. New York, NY: Routledge.

Liu, X. (2013). A note on statistical power in multi-site randomized trials with multiple treatments at each site. British Journal of Mathematical and Statistical Psychology, DOI: 10.1111/bmsp.12016.

Liu, X. (2013). Statistical power in three-arm cluster randomized trials, Evaluation and the Health Professions, DOI: 10.1177/0163278713498392.

Liu, X. (2013). Sample size determination for the confidence interval of mean comparison adjusted by multiple covariates. Statistical Methods & Applications, 22, 155-166.

Liu, X. (2013). A unified way to represent and compute the cumulative distribution function for noncentral t, F, and chi square. Communications in Statistics: Simulation and Computation, 42, 1433-1436.

Liu, X. (2012). Implications of statistical power for confidence intervals. British Journal of Mathematical and Statistical Psychology, 65, 427-437.

Liu, X. (2010). Sample size for confidence interval of covariate-adjusted mean difference, Journal of Educational and Behavioral Statistics, 35, 714-724.

Liu, X. (2009). Sample size and the width of confidence interval for mean differences. British Journal of Mathematical and Statistical Psychology, 62, 201-215.

Liu, X., & Ramsey, J. (2008). Teachers' job satisfaction: Analyses of the teacher follow-up survey in the United States for 2000-2001. Teaching and Teacher Education, 24, 1173-1184.

Liu, X., & Meyer, J. P. (2005). Teachers' perceptions of their job: A multilevel analysis of the teacher follow-up survey for 1994-95. Teachers College Record, 107, 985-1003.

Liu, X. (2003). Statistical power and optimum sample allocation ratio for treatment and control having unequal costs per unit of randomization. Journal of Educational and Behavioral Statistics, 28, 231-248.

Raudenbush, S., & Liu, X. (2001). Effects of study duration, frequency of observation, and sample size on power in studies of treatment effects on polynomial change. Psychological Methods, 6, 387-401.

Raudenbush, S., & and Liu, X. (2000). Statistical power and optimal design for multisite randomized trials. Psychological Methods, 5, 199-213.