FlowBlocks: a multi-touch ui for crowd interaction

Authors:
Florian Block;Daniel Wigdor;Brenda Caldwell Phillips;Michael S. Horn;Chia Shen
Affiliations:
Harvard University, Cambridge, Massachusetts, USA;University of Toronto, Toronto, Ontario, Canada;Harvard University, Cambridge, Massachusetts, USA;Northwestern University, Chicago, Illinois, USA;Harvard University, Cambridge, Massachusetts, USA
Venue:
Proceedings of the 25th annual ACM symposium on User interface software and technology
Year:
2012

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Abstract

Multi-touch technology lends itself to collaborative crowd interaction (CI). However, common tap-operated widgets are impractical for CI, since they are susceptible to accidental touches and interference from other users. We present a novel multi-touch interface called FlowBlocks in which every UI action is invoked through a small sequence of user actions: dragging parametric UI-Blocks, and dropping them over operational UI-Docks. The FlowBlocks approach is advantageous for CI because it a) makes accidental touches inconsequential; and b) introduces design parameters for mutual awareness, concurrent input, and conflict management. FlowBlocks was successfully used on the floor of a busy natural history museum. We present the complete design space and describe a year-long iterative design and evaluation process which employed the Rapid Iterative Test and Evaluation (RITE) method in a museum setting.