The purpose of this research is to examine whether outcome controls of group work (i.e. time pressure and reward), trust, and motivation affect shared leadership in virtual teams. In addition, we explore the relationship between shared leadership and information sharing effectiveness in these teams. Results of a laboratory experiment on collaboration technology-based virtual teams indicate that teams exhibited higher shared leadership under time pressure, and both motivation and trust promote shared leadership. We also find that shared leadership facilitates information sharing in these teams. However, reward control has no significant impact on any psychological factors in both ordinary least squares regression and ridge regression.