http://er.educause.edu/articles/2017/6/student-feedback-on-quality-matters-standards-for-online-course-design?utm_source=Informz&utm_medium=Email+marketing&utm_campaign=ER

"Indeed, research has singled out findability as not only the most significant predictor of both self-efficacy and motivation among students in online courses, but the only significant variable that predicts these two key factors."