Landscape vs Portrait Mode: Which is Faster to Use on Your Smart Phone?
Seipp, Karsten and Devlin, Kate. 2013. 'Landscape vs Portrait Mode: Which is Faster to Use on Your Smart Phone?'. In: Proceedings of the 15th International Conference on Human-computer Interaction with Mobile Devices and Services. Munich, Germany 27-30 August. [Conference or Workshop Item]No full text available
Official URL: http://doi.acm.org/10.1145/2493190.2494422
Abstract or Description
Touchscreen smart phones can be operated in portrait (P) and landscape (L) orientation. However, whether a device is faster to operate in P or L and where to put a button in each layout for best findability and operability remains unclear. This research makes a first attempt to examine in which orientation a touch-operated interface is faster to use and whether certain "zones" can be identified that have a particularly good performance in either orientation. Our results indicate that such zones exist in both L and P, and that L is faster to use than P. However, the effects are only visible when the user has not been primed with the target name. We conclude our study with practical advice for designers to improve usability and efficiency of time-critical applications and dialogues.