[1G4-OS-13b] OS-13

4:25 PM - 4:40 PM JST(7:25 AM - 7:40 AM UTC)

[1G4-OS-13b-04] A Questionnaire Survey on Anonymity and Disclosure-Target Preferences in the Disclosure of Preference InformationConsiderations on Service-Domain Differences and Psychological and Social Distance

〇Soichiro Morishita¹, Masanori Takano¹, Hideaki Takeda² (1. CyberAgent, Inc., 2. National Institute of Informatics)

Keywords:

digital platform,privacy,self-disclosure,psychological distance,social distance

Viewing/purchase histories, bookmarking (“favorites”), and recommendation lists on digital platforms strongly reflect users’ preferences. Focusing on anonymity in disclosing such preference information and on preferred disclosure targets, we conducted a questionnaire survey across service domains (video, music, e-commerce, and CGM). About half of respondents did not want to create such lists, and even among those who did, willingness to share was limited. When sharing, close targets (family, close friends) were primarily preferred; under anonymous conditions, willingness to disclose increased toward people with shared interests, users of the same service, and the general public. In contrast, offline acquaintances were avoided both with real names and anonymously, more so than online acquaintances. By domain, music showed comparatively low willingness to disclose histories even anonymously, and lower willingness to disclose to close others. We discuss these findings in terms of anonymity in self-disclosure and the psychological/social distance to targets, and present implications for community features that assume preference sharing.