Dr. John Denbleyker is a Principal Psychometrician and manages a team of psychometricians in the Psychometric Research and Data Analytics (PRDA) Department within Learning Sciences at HMH. He oversees the development and maintenance of the HMH adaptive Math and ELA growth assessments. In this role, he cultivates the score reporting metrics used with the HMH Growth Measure (GM) and conducts investigative research to ensure the reliability and validity of the GM test scores.

He is an expert in classical test theory, item response theory, score reporting, and adaptive testing. Previously, he worked as a psychometrician at the Minnesota Department of Education and as a district analyst, where he was actively involved with the MN Assessment Group. John holds a PhD in Educational Measurement and Statistics from the University of Iowa. He obtained a master’s degree in Sports Management from St. Cloud State University and a bachelor’s degree in Economics from the University of Minnesota-Duluth. John presents psychometric research each year at the National Council on Measurement in Education in additional to many other venues.