Nodobo Capture: Mobile Data Recording for Analysing User Interactions in Context

As part of our on-going research into analysing user experiences, the authors present Nodobo Capture: a tool for recording interaction sessions on mobile devices. Software running on the device records a user’s interactions, the screen state before and after these interactions, and context information gathered from available sensors. The gathered data can then be synchronised to a PC to be analysed in a complementary playback application, Nodobo Replay. To test the tool’s ability to generate suitable data, the authors conducted a study of touchscreen target selection accuracy. We found that users require more attempts to select targets smaller than a finger-width. Making the target any larger than finger-width has negligible effect on the user’s ability to select it. A small increase in the mean time taken to select targets while walking was observed. By comparing methodologies with previous studies, we found that usability studies can be conducted with Nodobo Capture more easily.