This quantitative correlational study included an investigation of potential factors effecting high attrition rates in postsecondary online courses. Online learner-instructor interaction was examined by assessing instructor response times (RTs), student satisfaction, and final course grades at an online two-year postsecondary institution. A sample (N=54) of online students in Spanish classes participated in the study by responding to 14 items in an online questionnaire. The findings from the study revealed no statistically significant difference between the RT and student final course grades. However, the linear regression test to investigate the correlation between RT and student satisfaction was statistically significant. The results indicated that while assignment RTs delivered by online instructors were essential to students' satisfaction, the RTs did not vitally influence students' final grades. Implications and recommendations for higher education institution administrators to reduce high online attrition are included. Suggested future research involves qualitative correlational study to observe the relationship between RTs, final grades, and satisfaction such as interviews for more in-depth understanding on types of strategies to develop to reduce online attrition. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]