Exploring Casual Point-and-Tilt Interactions for Mobile Geo-Blogging Simon Robinson, Parisa Eslambolchilar, Matt Jones 25th March 2009 Future Interaction Technology Lab, Computer Science Department, Swansea University, Swansea, SA2 8PP, UK {s.n.w.robinson, p.eslambolchilar, matt.jones}@swansea.ac.uk Abstract People record and share their experiences through text, audio and video. Increasingly they do this blogging from mobile devices. We il- lustrate a novel, mobile, low interaction cost approach to supporting the creation of a rich record of journeys made and places encountered: by pointing and tilting a mobile, users indicate their interests in a location. We built three mobile prototypes to explore the approach – one combines gestures and visual map feedback; the second provides a simpler visual interface; the third supports eyes-free interaction, allowing the user to simply point-and-tilt, with no visual display required. We describe two field studies undertaken to understand the value of the interaction styles afforded, then continue with a further user study to assess the interac- tion speed and accuracy between these interaction methods. We present the results of these studies and raise issues relevant to their design and to the wider class of devices and services concerned with mobile spatial information access. 1 Introduction Increasingly, people are documenting their lives – reporting on their emotions, thoughts, plans and actions – to remember, make sense of or share their ex- periences [10]. While mobile, this can be an arduous task, involving fiddly interaction with an interface that consumes most of the user’s attention. Our motivation is to improve and simplify this interaction, allowing users to casu- ally mark places of interest while mobile. In our approach, sensor data is used 1