This introductory workshop includes a discussion of the basics of item response theory (IRT) modeling, including discussions of defining model parameters, model assumptions, item and test characteristic and information curves, frequently-used IRT models, and differences between traditional methods and IRT methods. Also included are discussions of the role of IRT modeling in health outcomes research of evaluating and developing questionnaires, identifying differential item functioning, linking instruments, developing item banks, and assessing change and critical issues for applying this methodology in health outcomes research.

This lab-based training will take participants through more sophisticated features of online GIS (Geographic Information Systems). These include creating personal accounts, saving maps and data for easy access, creating customized geographies for focus or study areas, & uploading datasets--both point and polygon--using Excel files. No background training in using GIS software or data management is required.