Motivating Healthy Water Intake through Prompting, Historical   Information, and Implicit Feedback
  We describe Hydroprompt, a prototype for sensing and motivating healthy water intake in work environments. In a 3-week field deployment of Hydroprompt, we evaluate the effectiveness of three approaches to behavior change: historical information enabling users to compare their water intake lev- els across different times of day and days of week, implicit feedback providing subtle cues to users on the current hydration levels, and explicit prompting at- tempting to remind participants when hydration falls below acceptable levels or when substantial amount of time has elapsed since the last sip. 
Davide Neves, Donovan Costa, Marcio Oliveira, Ruben Jardim, Ruben   Gouveia, Evangelos Karapanos
cs.HC