The purpose of the study is to examine the relationship between enactive mastery experiences (with computers, the Internet, training, online courses, and hybrid course experiences) and online course self-efficacy (OCSE). A total of 94 mid-Illinois university students participated in the research. Pearson's correlation and multiple regression analyses were employed. Among the experiences, only online course experiences were found to be significantly and positively related to OCSE (t=2.593*, B=287*, p=.011). (Contains 4 tables.)