Shelby Haberman, PhD

Shelby Haberman is a principal and Independent Consultant at Haberman Statistics, providing advanced statistical analysis and consulting services. Haberman earned his undergraduate degree before completing his Ph.D. in statistics at the University of Chicago, where his fellowship began in 1968. He spent much of his career at Educational Testing Service (ETS), where he made foundational contributions to item response theory and the statistical methodology of standardized testing. His work on the Haberman model for log-linear analysis and on the detection of differential item functioning has had lasting impact on educational measurement.