Many studies have highlighted the advantages of expanding the input space of mobile devices by utilizing the back of the device. We extend this work by performing an elicitation study to explore users' mapping of gestures to smartphone commands and identify their criteria for using back-of-device gestures. Using the data collected from our study, we present elicited gestures and highlight common user motivations, both of which inform the design of back-of-device gestures for mobile interaction.

Shaikh Shawon Arefin Shimon, Sarah Morrison-Smith, Noah John, Ghazal Fahimi, and Jaime Ruiz. 2015. Exploring User-Defined Back-Of-Device Gestures for Mobile Devices. In Proceedings of the 17th International Conference on Human-Computer Interaction with Mobile Devices and Services (MobileHCI '15). ACM, New York, NY, USA, 227-232.

@inproceedings{Shimon:2015:EUB:2785830.2785890,
 author = {Shimon, Shaikh Shawon Arefin and Morrison-Smith, Sarah and John, Noah and Fahimi, Ghazal and Ruiz, Jaime},
 title = {Exploring User-Defined Back-Of-Device Gestures for Mobile Devices},
 booktitle = {Proceedings of the 17th International Conference on Human-Computer Interaction with Mobile Devices and Services},
 series = {MobileHCI '15},
 year = {2015},
 isbn = {978-1-4503-3652-9},
 location = {Copenhagen, Denmark},
 pages = {227--232},
 numpages = {6},
 url = {http://doi.acm.org/10.1145/2785830.2785890},
 doi = {10.1145/2785830.2785890},
 acmid = {2785890},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {Smartphones, back-of-device interaction, eyes-free interaction, gestures, hybrid input, mobile},
}