Richard Gershon, PhD, is Associate Chairman, Department of Medical Social Sciences, and faculty member, Department of Psychology, Northwestern University. Dr. Gershon is a leading expert in the application of Item Response Theory (IRT) in individualized and large scale assessments. He has developed item banks and Computerized Adaptive Testing (CAT) for educational, clinical, and health applications - including cognitive, emotional, and motor applications. He is currently principal investigator on the NIH Toolbox. He is also co-investigator and measurement development expert on each of the following projects: NINDS sponsored project “Quality of Life Outcomes in Neurological Disorders” (Neuro-QoL), NIH Roadmap project “Patient-Reported Outcomes Measurement Information System (PROMIS) and the cancer-specific supplement, plus several smaller projects.Email: gershon@northwestern.edu