Evaluation Strategies for HCI Toolkit Research

David Ledo*, Steven Houben*, Jo Vermeulen*, Nicolai Marquardt, Lora Oehlberg, and Saul Greenberg
*Authors contributed equally to the work.
Presented by
David Ledo

In Proceedings of CHI 2018: The ACM SIGCHI Conference on Human Factors in Computing Systems, Montréal, Canada, April 21–26, 2018, 18 pages.
[25.8% acceptance; 2590 submissions]


Interactive large surfaces have recently become commonplace for interactions in public settings. The fact that people can engage with them and the spectrum of possible interactions, however, often remain invisible and can be confusing or ambiguous to passersby. In this paper, we explore the design of dynamic peripheral floor visualizations for revealing and mediating large surface interactions. Extending earlier work on interactive illuminated floors, we introduce a novel approach for leveraging floor displays in a secondary, assisting role to aid users in interacting with the primary display. We illustrate a series of visualizations with the illuminated floor of the Proxemic Flow system. In particular, we contribute a design space for peripheral floor visualizations that (a) provides peripheral information about tracking fidelity with personal halos, (b) makes interaction zones and borders explicit for easy opt-in and opt-out, and (c) gives cues inviting for spatial movement or possible next interaction steps through wave, trail, and footstep animations. We demonstrate our proposed techniques in the context of a large surface application and discuss important design considerations for assistive floor visualizations.

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