James S. Roberts

James S. Roberts is an Associate Professor of Psychology at the Georgia Institute of Technology’s School of Psychology and serves as the Quantitative Psychology Program Coordinator. His research focuses on advancing item response theory (IRT) models, particularly unfolding models for measuring psychological constructs such as attitudes, satisfaction, and personality differences. He developed the GGUM2004 software, widely used in global research, and his work has been recognized by the NSF CAREER Award. His current research extends unfolding models to multidimensional domains and explores longitudinal measurement challenges.

Education:

• Ph.D. (1995), Experimental Psychology (Quantitative), University of South Carolina

Research Interests:

• Development and application of IRT models
• Unfolding models for multidimensional data
• Multidimensional scaling and applied statistics
• Longitudinal measurement invariance

Awards:

• National Science Foundation Faculty Early Career Development (CAREER) Award

Advising & Grants:

• Guides students in IRT model development (e.g., Fang, Cui, Wang, Thompson)
• NSF-funded research on unfolding model applications

Labs: Leads the Psychology Research and Development Lab (PRDLab), accessible at http://www.psychology.gatech.edu/prdlab/.