Persuasive Technology: Development and Implementation of Personalized Technologies to Change Attitudes and Behaviors : 12th International Conference, PERSUASIVE 2017, Amsterdam, The Netherlands, April 4-6, 2017, Proceedings - de Vries, Peter W.; Oinas-Kukkonen, Harri.; Siemons, Liseth.; Beerlage-de Jong, Nienke.; van Gemert-Pijnen, Lisette. (Information Systems and Applications, incl. Internet/Web, and HCI ;, 2017)