With the rapidly expanding availability of online courses, concerns have been raised about student engagement and connection within the online environment. Using an experimental design, we examined the effects of video camera, microphone (audio), and chat box communication on students' experiences of social presence, peer rapport, motivation, satisfaction, and anxiety. A total of 133 undergraduate students were randomly assigned to a video, audio, or chat box condition and completed an online interactive group task followed by a post-task survey. Multiple one-way ANOVAs indicated that participants in the chat box condition reported lower levels of social presence, peer rapport, motivation and satisfaction compared to both the video and audio conditions. However, there were no differences between the video and audio conditions. Those in the video condition also reported higher anxiety levels than those in the chat box condition, but all groups reported low levels of anxiety. We recommend that students participate in their online classes using video cameras and/or microphones to increase engagement and interpersonal connections with peers. [Note: The page range (334-354) shown on the PDF is incorrect. The correct page range is 354-372.]