DIFFERENCES IN LEARNING FROM COMPLEX VERSUS SIMPLE VISUAL INTERFACES WHEN OPERATING A MODEL EXCAVATOR By EMILY KIESON Bachelor of Science in Ecology and Evolution Rutgers University New Brunswick, NJ 2000 Post Graduate Diploma in Equine Science University of Edinburgh Edinburgh, Scotland 2016 Submitted to the Faculty of the Graduate College of the Oklahoma State University in partial fulfillment of the requirements for the Degree of MASTER OF SCIENCE May, 2017