Nowadays mobile platform is becoming more and more influential due to the increasing smartphone usage in people’s daily life. Conflicting ideas always exist when making a group decision because everyone has his/her own concern/opinion. Since voting is a simple and classic way of reflecting ideas from a group of people, we want to explore social voting behaviors on mobile platforms. By conducting this research study, we hope to unveil how to improve social voting user experience; our focus is on how a change in voting interface affects people’s voting behavior. We will provide two interfaces: one is a ranking from negative to positive measures, and the other is a ranking of all positive measures. The recruited groups of people in our study will use these two interfaces to make decisions on group outing to a movie or restaurant. From this one-‐month study, we figured that people prefer the negative-‐to-‐ positive measures better than the all-‐positive measures.