A nudge is a method to influence individual choices without taking away freedom of choice. We are interested in whether nudges can help adolescents avoid privacy and safety threats on social network services (SNS). We conducted online surveys to compare how 11 different nudge designs influence decisions in 9 scenarios featuring various privacy and safety threats. We collected 29,608 responses from adolescent SNS users (self-claimed high school and university students), and found that nudges can help to reduce potentially risky choices. Participants were more likely to avoid potentially risky choices when presented with negative frames (e.g., “90% of users would not share a photo without permission”) than affirmative ones (e.g., “10% of users would”). Social nudges displaying statistics on how likely other people would make potentially risky decisions can have a negative effect in comparison to a nudge with only general privacy and safety suggestions. We conclude by providing design considerations for privacy/safety nudges targeting adolescent SNS users.



正木 博明,柴田 健吾,星野 秀偉,石濱 嵩博,齋藤 長行,矢谷 浩司.若年層SNSユーザに対するプライバシ・安全上の行動に関するナッジの大規模定量調査.情報処理学会論文誌,61(12),1892-1902,2020.(paper)

Hiroaki Masaki, Kengo Shibata, Shui Hoshino, Takahiro Ishihama, Nagayuki Saito, and Koji Yatani. Exploring Nudge Designs to Help Adolescent SNS Users Avoid Privacy and Safety Threats. In Proceedings of ACM CHI Conference on Human Factors in Computing Systems, 1-11, April 2020. Honorable Mention Award winner (paper)

正木 博明,柴田 健吾,星野 秀偉,石濵 嵩博,齋藤 長行,矢谷 浩司.「SNS上の行動に関する若年層ユーザに対するナッジの効果検証」情報処理学会HCI研究会,2020年1月.学生奨励賞受賞.(paper)