Understanding the Heisenberg Effect of Spatial Interaction: A Selection Induced Error for Spatially Tracked Input Devices

Abstract

Virtual and augmented reality head-mounted displays (HMDs) are currently heavily relying on spatially tracked input devices (STID) for interaction. These STIDs are all prone to the phenomenon that a discrete input (e.g. button press) will disturb the position of the tracker, resulting in a different selection point during ray-cast interaction (Heisenberg Effect of Spatial Interaction). Besides the knowledge of its existence, there is currently a lack of a deeper understanding of its severity, structure and impact on throughput and angular error during a selection task. In this work, we present a formal evaluation of the Heisenberg effect and the impact of body posture, arm position and STID degrees of freedom on its severity. In a Fitt's Law inspired user study (N=16), we found that the Heisenberg effect is responsible for 30.45% of the overall errors occurring during a pointing task, but can be reduced by 25.4% using a correction function.

Keywords
pointing
VR
STID
Heisenberg Effect
selection
correction
offset
Authors
Dennis Wolf
Ulm University, Ulm, Germany
Jan Gugenheimer
Ulm University, Ulm, Germany
Marco Combosch
Ulm University, Ulm, Germany
Enrico Rukzio
Ulm University, Ulm, Germany
DOI

10.1145/3313831.3376876

Paper URL

https://doi.org/10.1145/3313831.3376876

Conference: CHI 2020

The ACM CHI Conference on Human Factors in Computing Systems (https://chi2020.acm.org/)

Session: 3DUI spaces

Paper session
306AB
5 items in this session
2020-04-30 09:00:00
2020-04-30 10:15:00
Japanese summary
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