R. Darrell Bock

We are sad to relay news of the death of R. Darrell Bock. Darrell was a titan in the field – his work defined the shape and trajectory of modern psychometrics. We each had the pleasure of meeting Darrell at various points in our careers and he was as impressive in person as he was in his published work. All three of us – indeed this entire company – have been shaped by Darrell’s many contributions. We echo the closing … Read More

Announcing the Release of IRTPRO™ 5.2

VPG is pleased to announce the immediate availability of IRTPRO™ Version 5.2 which includes an option to import current Excel spreadsheets (*.xlsx) in addition to older Excel spreadsheets (*.xls extension). Users holding active IRTPRO™ subscription licenses are encouraged to upgrade, by logging into their account on the VPG Store and navigating to the License Detail record under My Account – Licenses – Manage.