Craig S. Wells, PhD, is Associate Professor in the Department of Educational Policy, Research, and Administration and Associate Director of the Center for Educational Assessment at the University of Massachusetts Amherst. Dr. Wells teaches courses in statistical and psychometric methods. His research interests pertain to the application of item response theory models specifically for examining the effects and detection of item parameter drift, differential item functioning, and model misfit. He also has a keen interest in the philosophy of science and its applications to behavioral and social science research.

Molly Faulkner-Bond, PhD, studied under Ron Hambleton at the University of Massachusetts Amherst and earned her doctorate in Research, Educational Measurement, and Psychometrics in 2016. She has published in prominent national and international journals such as the Review of Research in Education, the International Journal of Testing, and Educational Measurement: Issues and Practice. Her research focuses on on validity issues and evaluation in large-scale K-12 testing systems, with a particular focus on policies and assessments for English learners.