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VPG releases flexMIRT® Version 3.62

VPG is pleased to announce the immediately availability of flexMIRT® Version 3.62.  Version 3.62 fixes a bug with multiple-group IRT modeling, and a labeling issue in output delivery. Importantly, Version 3.62 uses a completely new pseudo random number generator (PRNG), replacing the one that has been in use since flexMIRT 2.0.  The new proprietary PRNG is based on the popular Mersenne Twister 19937 generator that substantially outperforms the PRNG used by flexMIRT previously.  They will lead to slightly different results … Read More

Dr. Michael C. Edwards joins the Department of Psychology at Arizona State University

In January 2017, VPG’s Dr. Edwards joined the faculty of the Department of Psychology at Arizona State University. Dr. Edwards is an Associate Professor in the Quantitative Area. Prior to joining the faculty at ASU, Dr. Edwards was an Assistant (2006-2011) and Associate (2011-2016) Professor in the Quantitative Area of the Department of Psychology at The Ohio State University.