Publication: Multiplexing Spatial Memory: Increasing the Capacity of FastTap Menus with Multiple Tabs

The capacity of spatial multi-touch menus such as FastTap is limited by device screen size. We explore the idea of using multiple tabs to increase capacity - multiplexing the tablet's screen space so each location holds multiple items. Earlier work has shown potential of this idea for smartwatches, but no evaluations have considered larger devices. To assess issues with interference-based errors and spatial memory development, we built two FastTap systems with multiple tabs and conducted two studies. We first tested user learning of 16 targets with a training game, and found that participants easily adapted to the multi-tab model, were able to perform memory-based shortcuts, and made few interference-based errors. The second study used realistic drawing tasks and showed that people successfully used the multi-tab FastTap system, with 88% of selections made using shortcuts by the study's end. Our work demonstrates that spatial memory can successfully be multiplexed, and that tabs are a promising way to increase command set sizes for spatial interfaces.

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Participants

Varun Gaur
University of Saskatchewan
Md. Sami Uddin
University of Saskatchewan
Carl Gutwin
University of Saskatchewan

Citation

Gaur, V., Uddin, M., Gutwin, C. 2018. Multiplexing Spatial Memory: Increasing the Capacity of FastTap Menus with Multiple Tabs. In MobileHCI '18: 20th International Conference on Human-Computer Interaction with Mobile Devices and Services, Barcelona, Spain. 13 pages. DOI=10.1145/3229434.3229482.

BibTeX

@inproceedings {522-MultiTab-FastTap_MobHCI18_CR_su-6,
author= {Varun Gaur and Md. Sami Uddin and Carl Gutwin},
title= {Multiplexing Spatial Memory: Increasing the Capacity of FastTap Menus with Multiple Tabs},
booktitle= {MobileHCI '18: 20th International Conference on Human-Computer Interaction with Mobile Devices and Services},
year= {2018},
address= {Barcelona, Spain},
pages= {13 pages}
}