摘要：Police agencies have been posting regularly on Facebook and trying to use this social mediaplatform for building community policing.However, little is known about how the publiccomments to police agencies' posts and how the agencies further reply to public comments onFacebook.Addressing these questions helps us understand police agencies'practices of usingFacebook for supporting dialogic accounting, i.e., responding to multiple viewpoints, on thissocial media platform.In this work, we collected 29,928 Facebook posts of l3 municipal policeagencies in the U.S.and 628,098 public comments to those agencies' posts, as well as all replies to the public comments (including replies from other public users and the agencies).we find that the agencies only replied to 907(o.1%)public comments. Our findings show that(1) the public's comments varied in diverse topics, but the agencies mainly replied to thosecomments that were Seeking information; (2) the agencies replied quickly when Acknowledgingpositive public comments; and (3) the agencies often ignored negative comments. We alsodiscuss design implications for social media platforms to support better dialogic accountingpractices.
关键词：Conversation;Facebook;police agency;public comment;dialogic accounting;case study
