Group coherence is facilitated in a group environment, such as a gaming, competitive, cooperative or collaborative environment. In one embodiment, a graphical representation of a scenario may be presented to a plurality of individuals. A physiological measure for each of the plurality of individuals may be sampled and used to track the individuals' heart rhythm patterns. A current group coherence level for the plurality of individuals may then be determined, where the group coherence level corresponds to a collective degree to which said plurality of heart rhythm patterns exhibit a sine waveform. In one embodiment, an appropriate modification to the scenario may be determined, where the modification is based on the current group coherence level. The updated graphical representation of the scenario may then be presented to the plurality of individuals.