Privacy concerns on social networking sites: a longitudinal study

This longitudinal cohort study examines whether privacy concerns have changed on social network sites (SNSs), in particular Myspace/Facebook, as both the users and the medium have matured. Tracking a cohort of 15–17-year olds at three points across an 8-year period, it uses focus groups and self-determination theory to investigate the perceptions of control and vulnerability of 45 participants. The findings suggest that while consumers appear to trust SNSs to protect their private information, they are reluctant to trust advertising or brands on these sites. Over time, users’ autonomy, connectedness and competence have shifted from experimenters, who have nothing to lose, to acceptors who felt their social life was more important than their privacy concerns, to managers who strategically controlled their information in order to reduce their vulnerability.