A new paper in Applied Psychological Measurement authored by VPG’s Drs. Houts and Edwards examines methods for better understanding detection of surface and underlying local dependence in IRT models. An early online copy of “Comparing Surface and Underlying Local Dependence Levels via Polychoric Correlations” is now available..
Drs. Cai and Wirth will be holding an IRT software short-course entitled “flexMIRT®: Flexible multilevel multidimensional item analysis and test scoring” this July 12th in Beijing China. The course will be taught in English with some annotations and translations to Chinese. For more information please see the IMPS 2015 course description.
VPG will be offering a 1-day flexMIRT® IRT software workshop entitled “flexMIRT®: Flexible Multilevel Multidimensional Item Analysis and Test Scoring”. The class will be held on April 15th 2015 in Chicago Illinois as part of NCME’s pre-conference training program. For more information see page 9 of the 2015 NCME Preliminary Program.
Dr. Li Cai, a VPG Managing Partner, joined England’s Standards & Testing Agency’s Technical Advisory Group. The group oversees and advises on technical matters regarding psychometric developments and implementation of national academic tests.
The FDA recently released a Draft Guidance on developing new treatments for acute migraine. Of note to those involved in patient-reported outcomes are the sections on endpoint selection which suggests that sponsors examine multiple domains (other than pain itself) as well as the most bothersome symptom to the patient (i.e. nausea). Find the guidance here
The FDA has recently posted a Draft Guidance on the procedure for requesting and presenting at a meeting with the Center for Drug Evaluation and Research (CDER). One of the potential topics pharmaceutical companies may want to address at a meeting with CDER concerns development of clinical outcome assessments in the early parts of clinical development prior to a new COA being ready for formal qualification. Vector Psychometric Group has experience presenting the benefits of modern psychometric techniques to the FDA.
Managing partner, Li Cai, will instruct nearly 100 new users on the leading IRT software, flexMIRT®. Sessions will take place at several venues in the coming week in Korea. 9/12 Seoul National University: 1-Day IRT / flexMIRT® workshop 9/13 Korean Society for Educational Evaluation: Presentation on cognitive diagnostic and multidimensional IRT models in flexMIRT® 9/14 Korea Institute for Curriculum and Evaluation (KICE): Presentation on advanced psychometrics implemented in flexMIRT®
The DIA’s Study Endpoints Community is sponsoring an educational presentation entitled, “Gathering better PRO data by using Item Response Theory” presented by Michael C. Edwards, PhD, Associate Professor, The Ohio State University. Click to download the Presentation Slides. Dial-in numbers United States Toll Free (866) 668-0721 Standard International +1(845) 977-0098 International Dial-in numbers Participant code 4703624044
VPG managing partner, Dr. Michael Edwards, presented “Some thoughts on validity and model fit” at the 79th Annual Meeting of the Psychometric Society. Edwards discusses that as scores require validity testing, so do model fit indexes themselves. The slide deck can be downloaded here: Edwards IMPS 2014 7.21.14
Drs. Li Cai and Carrie Houts of VPG will provide an in-depth introduction to the flexMIRT system and provide valuable hands on experience with the software. Find out more about the course here.