With the development of technology, the workplace is adopting new mediums to engage in collaborative work with others. The quality of this collaboration varies by the technology medium being utilized (Daft & Lengel, 1986; Kock, 2005); The goal of this research is to study the difference in collaboration effectiveness for people in mixed (MR) and virtual reality (VR) environments. Participants working in teams of two were given a collaborative idea generation task in MR or VR, at which point their collaboration effectiveness was measured through behavior, conversation, and reported experience. The results of this study showed no significant differences in dyad collaboration between conditions. Implications and directions for future research on this topic are further discussed.