Device-based interactions for anonymous voting and rating with mobile devices in collaborative scenarios.

Although one advantage of collocated collaboration is to work and discuss directly, some aspects have to be treated anonymously. For example, voting for partial solutions sometimes needs to be performed anonymously to enable unbiased ratings. We provide device-based interactions for voting anonymously in collocated settings using mobile devices. Since looking at the mobile device's screen distracts users from their surrounding and whether they are unobserved or not, we propose simple interactions based on metaphors that can be performed blindly and use the device's sensors as well as the (multi-)touch display. By tapping on the fingerprint sensor or the display a given rating can be counted. Motion sensors are used to accept or reject a partial solution. To demonstrate our interactions, we implemented a prototypical application using the fingerprint sensor for rating. The proposed interactions facilitate anonymous voting and rating to ensure unbiased decisions.