Orientation and Mobility (O&M) training is an important aspect in the education of visually impaired students. In this work we present a scavenger hunt-like location-based game to support O&M training. In two comparative studies with blind and partially sighted students and interviews with teachers we investigate if a mobile game played in the real world is a suitable approach to support O&M training and if a mobile location-based O&M training game is preferred over a game played in a virtual world. Our results show that a mobile location-based game is a fruitful approach to support O&M training for visually impaired students, and that a mobile location based game is preferred over playing in a virtual world. Based on the gathered insights we discuss implications for using mobile location-based games in O&M training.

Current apps for cyclists follow the "stop-to-interact" paradigm, neglecting that people interact with their smartphones in motion. We conducted two studies to explore paradigms for interaction that can be applied while cycling. In an enactment study, participants freely explored movements suitable for interaction while using a bicycle trainer and discussed respective requirements and constraints. The analysis of the interaction movements and the group discussion showed that users preferred to keep their hands on the handlebars while performing subtle gestures with their fingers. Based on this we performed an outdoor study focused on interacting with a smartphone game while riding a bicycle, using three interaction options: buttons on the handlebars, the phone's touchscreen, and a wristband activated by flipping the wrist. Using buttons resulted in a significantly lower physical demand and significantly lower frustration compared to the other alternatives, as well as better task performance compared to interacting using the wristband.

This paper presents a novel application of participatory design fiction for sustainable domestic energy consumption. In our study we examine how social practices relate to a newly developed energy management system introduced to households. We explore how design fiction can be used to identify current design limitations and to showcase future design directions to overcome these limitations. In particular, we investigated how energy consumption feedback is leaving users in a state of "helplessness" despite raising awareness of their environmental impact. Through participatory fictional future story-writing workshops we identified five levels of empowerment that design for sustainability practitioners can engage with. Our proposal is to use those levels of empowerment to reframe sustainable design by shifting from behaviour to social practices and from awareness to empowerment.