Stetson University 1 article published in JoVE Behavior Eye-tracking to Distinguish Comprehension-based and Oculomotor-based Regressive Eye Movements During Reading Jocelyn R. Folk1, Michael A. Eskenazi2 1Department of Psychological Sciences, Kent State University, 2Department of Psychology, Stetson University The method was designed to investigate the role of inhibition of return (IOR) in regressive eye movements during reading. The focus is on differentiating between regressions triggered as a result of comprehension difficulty versus those triggered from oculomotor error, including the role of IOR in the two types of regressions.