Gareth McCray is a Research Associate in Statistics at Keele University. His research interests include Psychometric Measurement Construction, Item Response Theory and Rasch modeling, Diagnostic Testing, and Child Development Measurement and Global Health. He has been involved with several national and international studies related to psychometric measurement or diagnosis. His methodological work appears in journals such as BMJ Global Health, Frontiers in Psychology, BMC Medical Research Methods, Medical Education and Academic Medicine.