Understanding the heisenberg effect of spatial interaction: A selection induced error for spatially tracked input devices
D Wolf, J Gugenheimer, M Combosch… - Proceedings of the 2020 …, 2020 - dl.acm.org
Proceedings of the 2020 CHI conference on human factors in computing systems, 2020•dl.acm.org
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 (eg 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 …
on spatially tracked input devices (STID) for interaction. These STIDs are all prone to the
phenomenon that a discrete input (eg 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 …
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.
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