Cognitive and Touch Performance Effects of Mismatched 3D Physical and Visual Perceptions

While research in the field of augmented reality (AR) has produced many innovative human-computer interaction techniques, some may produce physical and visual perceptions with unforeseen negative impacts on user performance. In a controlled human-subject study we investigated the effects of mismatch...

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Bibliographic Details
Published in:	2018 IEEE Conference on Virtual Reality and 3D User Interfaces (VR) pp. 1 - 386
Main Authors:	Hochreiter, Jason, Daher, Salam, Bruder, Gerd, Welch, Greg
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01.03.2018
Subjects:	Cameras Head Human-centered computing-Human computer interaction (HCI)-HCI design and evaluation methods-User studies Human-centered computing-Human computer interaction (HCI)-Interaction paradigms-Mixed/augmented reality Human-centered computing-Human computer interaction (HCI)-Interaction techniques Resists Task analysis Three-dimensional displays Training Visualization
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Summary:	While research in the field of augmented reality (AR) has produced many innovative human-computer interaction techniques, some may produce physical and visual perceptions with unforeseen negative impacts on user performance. In a controlled human-subject study we investigated the effects of mismatched physical and visual perception on cognitive load and performance in an AR touching task by varying the physical fidelity (matching vs. non-matching physical shape) and visual mechanism (projector-based vs. HMD-based AR) of the representation. Participants touched visual targets on four corresponding physical-visual representations of a human head. We evaluated their performance in terms of touch accuracy, response time, and a cognitive load task requiring target size estimations during a concurrent (secondary) counting task. After each condition, participants completed questionnaires concerning mental, physical, and temporal demands; stress; frustration; and usability. Results indicated higher performance, lower cognitive load, and increased usability when participants touched a matching physical head-shaped surface and when visuals were provided by a projector from underneath.
DOI:	10.1109/VR.2018.8446574