Tag Archives: conference

DIA 2016 Validity and Fit for Purpose

Drs. Wirth and Edwards of VPG will be joined by Drs. Ashley Slagle (Aspen Consulting) and Johnathan Rubright (National Board of Medical Examiners) when they discuss the roll of modern validity theory in evaluating a COA’s “fit for purpose”. Join them at DIA 2016 for Session #247 entitled “Fit for Purpose and Modern Validity Theory in PROs”. Learn more here.  

ISOQOL Presentation: Longitudinal IRT

Dr. R. J. Wirth will be presenting on the use of longitudinal item response theory models for scale development in small samples. The presentation, entitled “PRO development with small samples: An innovative use of repeated measures IRT”, will be presented on October 22nd during session 107 (starting at 4:05 PM Pacific) at the ISOQOL 22nd Annual Conference in Vancouver.