American Statistical Association
New York City
Metropolitan Area Chapter

New York State Psychiatric Institute
and Columbia University
Seminar for Biostatistics in Psychiatry



Michael C. Edwards, Ph.D.
Department of Psychology
Quantitative Program
The Ohio State University


Item response theory (IRT) is being more widely used than ever in venues ranging from educational assessment to patient reported outcomes. In this talk, I will review two areas within the IRT literature which have seen increased attention and development in the past several years. After a very brief introduction to IRT, I will talk about multidimensional IRT (MIRT). MIRT models have undergone something of a renaissance of late, as long-standing estimation issues have been resolved. I will review some of these advances, but primarily I will focus on the various types of multidimensional models in use with a special emphasis on the bi-factor model. The talk will conclude with a discussion of how the concept of minimum detectable change (MDC) fits within the IRT framework. By extension, it will be argued that the traditional

Biographical Note

Dr. Edwards is an Associate Professor in quantitative area of the Department of Psychology at The Ohio State University. He received his Ph.D. in 2005 from the L.L. Thurstone Psychometric Laboratory at the University of North Carolina at Chapel Hill. His main lines of research involve methodological issues in measurement with a special focus on item response theory, factor analysis, and computerized adaptive testing. His quantitative work has appeared in Psychological Methods, Psychometrika, and Structural Equation Modeling. In addition to his methodological work, Dr. Edwards has numerous collaborations with researchers in other substantive areas. These collaborations have resulted in publications in a wide range of outlets including Autism, Psychological Assessment, Journal of Abnormal Psychology, and Journal of Clinical Epidemiology.

He teaches undergraduate courses on quantitative methods in psychology and the impact of testing in modern society. At the graduate level, he teaches an introduction to IRT and a regression course. He has been involved in research funded by the National Institutes of Health, the National Science Foundation, the College Board, the Robert Wood Johnson Foundation, the American College of Rheumatology, the Association of American Medical Colleges, the North Carolina Department of Public Instruction, the VA Healthcare System of Ohio, and the Law School Admission Council.

Date: Tuesday, October 25, 2011
Time: 3:30 - 4:30 P.M.
Location: New York State Psychiatric Institute
1051 Riverside Drive
6th Floor Multipurpose Room (6602)
New York, New York


Coffee: 3:00 to 3:30 P.M.
Reception: 4:30 to 5:00 P.M.

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