Abstract: A web-based application for use on a mobile device allows a user to provide response input indicating the user's current positive/negative response, opinion, reaction, to an event or other shared experience and “publish” the response input data by broadcasting it to one or more other users or by providing the response input data to a centralized or distributed database or other repository of response input data from other individuals experiencing the same event. The application may acquire response input data from the repository or directly from one or more other users and display acquired response input data graphically or in some other concise and meaningful format that visually conveys the acquired response input data collectively and/or by individuals or groups or subgroups of individuals, thereby providing a means to acquire and characterize the time varying responses, opinions, and reactions of a population sharing the experience of an event or other stimulus.