Machine-implemented methods and computer systems are disclosed for determining a collective outcome for a survey from a plurality of potential outcomes. Each outcome is a particular combination of options. Each survey participant ranks the options to develop an influent function. For each participant, the influent function is applied to each potential outcome to determine a satisfaction score for the outcome. A collective dissonance score is calculated based on the participants' satisfaction scores for the potential outcome. The potential outcomes are ordered based on a weighted combination of the satisfaction scores and the collective dissonance score for each of the potential outcomes. In particular embodiments, the methods and systems aim to determine a collective outcome that achieves greatest satisfaction and minimizes dissonance among the participants.