Karau, "et al.", concluded that social loafing occurred because there was usually a stronger perceived contingency between individual effort and valued outcomes when working individually. When working collectively, other factors frequently determine performance, and valued outcomes are also divided among all group members. All individuals are assumed to try to maximize the expected utility of their actions. The CEM also acknowledges that some valued outcomes do not depend on performance. For example, exerting strong effort when working on intrinsically meaningful tasks or with highly respected team members may result in self-satisfaction or approval from the group, even if the high effort had little to no impact on tangible performance outcomes.