PROBLEM TO BE SOLVED: To provide a system capable of automatically determining a social distance which an application gives to a user.SOLUTION: A registration data management section 36 of a server 30 identifies a piece of information (user reaction value) for identifying an affect of a user while the user uses an application based on a piece of sensor input information which is collected by an information collection unit 20 etc., and determines a relative social distance score among plural applications based on the user reaction value while the user uses plural applications.SELECTED DRAWING: Figure 3
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