The purpose of this study was to examine the effects of academic self-efficacy, group efficacy, and social
presence on project-based learning outcomes(learning satisfaction and achievement) through Facebook. In
order to examine this purpose, 42 university students participated project-based learning activities through
Facebook during 8 weeks. After the instruction, they responded surveys regarding academic self-efficacy,
group efficacy, social presence, and learning satisfaction and took academic achievement test. Multiple
regression analyses were used as a data analysis method. The results of this study were summarized as
follows: first, academic self-efficacy and social presence significantly predict learning satisfaction, however
group efficacy did not. second, social presence significantly predicts learning achievement, however, academic
and group efficacy did not. Based on these findings, it is suggested that instructor or instructional
designers should focus on promoting social presence when design or implement project-based learning
activities through Facebook.