The purpose of this action research study was to measure the transactional distance of computer science students who participated in an online virtual community after completing a college preparation program. Using data and results generated from previous cycles of research I developed and moderated an online virtual community designed to lessen transactional distance using a sequential exploratory mixed-methods research design. This study addressed the following research questions: 1. How and to what extent will participation in a virtual community influence the transactional distance between students and course content? 2. How and to what extent will participation in a virtual community influence the transactional distance between students and their instructors/teaching assistants? 3. How and to what extent will participation in a virtual community influence the transactional distance between students and other students in the same courses? The participants for this action research study included approximately 200 students enrolled in six online sections of an entry level computer programing course from various locations around the world. Also participating in the community were the online instructors who taught the course, teaching assistants, advisors, and the action researcher. Using the sociocultural, transactional distance, self-determination, and adult learning theories as a framework, the virtual community provided occasions for students and instructional team members to share experiences and support each other academically and socially. The community was designed to enable students to give and receive frequent feedback, increase autonomy and their sense of belonging, and provide additional opportunities for them to learn from each other. Through a descriptive analysis of the transactional distance survey results, I was able to determine that transactional distance between students and their teachers, and students the course content slightly increased, while the transactional distance between students and their classmates somewhat decreased. There was also an increase in average final grade and pass rate and a decrease in student withdrawal rate. [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.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]