VPG is pleased to announce the availability of flexMIRT® Version 3.6, which can be obtained through our webstore. flexMIRT® Version 3.6 offers an improved user-friendly GUI and substantially upgraded statistical modeling capabilities, including new model fit indices, multidimensional models with non-normal latent densities, Markov chain Monte Carlo (MCMC) estimation, crossed random effects, and improved diagnostic classification modeling.
We made minor bug fixes to the IRTPRO installer. The revised installer is available in the VPG Store for registered IRTPRO license holders by clicking on “Download Software” button within My Account – License tab.
VPG is pleased to announce that with the acquisition of Scientific Software International, Inc. in early 2020, IRTPRO™ Version 5.0 is being released under a new subscription-based software delivery and support model. A popular IRT software program for both patient-reported outcomes analysis and educational assessment development, this latest upgrade release offers significant new features and improvements. Please visit irtpro.com to find out more about IRTPRO™. Visit our storefront at store.vpgcentral.com to learn more about licensing and to make a purchase.
VPG is pleased to announce the availability of flexMIRT® Version 3.6 Release Candidate, which can be obtained through our webstore. flexMIRT® Version 3.6 offers an improved user-friendly GUI and substantially upgraded statistical modeling capabilities, including new model fit indices, multidimensional models with non-normal latent densities, Markov chain Monte Carlo (MCMC) estimation, crossed random effects, and improved diagnostic classification modeling.
Vector Software Acquisition, a sole subsidiary of Vector Psychometric Group, acquired Scientific Software International, Inc. expanding Vector’s statistical software offerings. Vector Psychometric Group (VPG), a leading provider of psychometric and data analytic solutions for clinical outcomes, educational, and psychological assessment, has acquired Scientific Software International, Inc. (SSI), a market-leader in statistical software for social, behavioral, and biostatistical sciences. SSI has been developing, publishing, and distributing specialized statistical software products since 1971. SSI has been a driving force behind many widely … Read More
As part of our Patient Focused Drug Development (PFDD) efforts, the U.S. Food and Drug Administration (FDA) developed a pilot grant program to support the development of publicly available core set(s) of Clinical Outcome Assessments (COAs) and their related endpoints for specific disease indications (RFA-FD-19-006). On September 11, 2019 the FDA made three awards under this grant program. These awards will provide avenues to advance the use of patient input as an important part of drug development that can foster innovation and … Read More
Edwards, M.C, Houts, C.R., & Wirth, R.J. (In Press). Measurement invariance, the lack thereof, and modeling change. Quality of Life Research.
Dr. Li Cai will serve on the GRE Board Research Committee for the next three years.
James S. McGinley, R. J. Wirth, Gabriel Boucher, Dawn C. Buse, Stephen Donoghue, Jelena Pavlovic, Richard B. Lipton, Anne MacGregor (2017). Individual Differences in the Relation of Migraine and Menstruation: Examining the ICHD-3beta Time Window. Poster (EP-02-022) to be presented at the 18th Congress of the International Headache Society in Vancouver, Canada.
Edwards, M.C., Slagle, A., Rubright, J.D., & Wirth, R.J. (in press). Fit for purpose and modern validity theory in clinical outcomes assessment. Quality of Life Research. Special Section: Test Construction (By Invitation Only). http://rdcu.be/t1f0