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The Uncertainty Principle

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Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...

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Controlled Rotation of Human Observers in a Virtual Reality Environment

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Direct vs. Score-based Selection: Understanding the Heisenberg Effect in Target Acquisition Across Input Modalities

Linjie Qiu, Duotun Wang, Boyu Li

IEEE Transactions on Visualization and Computer Graphics

|March 30, 2026

Summary

Bare-hand virtual reality (VR) input is more prone to the Heisenberg Effect, where confirming a selection disturbs the target. A new weighted VOTE technique improves selection accuracy by considering interaction history.

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Area of Science:

Human-Computer Interaction
Virtual Reality
Usability Studies

Background:

Target selection is crucial in virtual reality (VR).
The Heisenberg Effect, where selection confirmation disturbs the target, is a known issue, primarily studied with controllers.
Its impact on bare-hand input and mitigation strategies are less understood.

Purpose of the Study:

To investigate the Heisenberg Effect in VR using both controller and bare-hand input.
To compare direct and score-based selection mechanisms under the Heisenberg Effect.
To introduce and evaluate a novel technique, weighted VOTE, for mitigating the Heisenberg Effect.

Main Methods:

A within-subject study comparing controller and hand input modalities.
Evaluation of direct and score-based selection mechanisms.
Development and temporal analysis of a history-based intention accuracy model (weighted VOTE).

Main Results:

Bare-hand input is more susceptible to the Heisenberg Effect than controller input.
Direct selection is sensitive to target width, while score-based selection is sensitive to target density.
The proposed weighted VOTE method demonstrated improved selection accuracy over baseline techniques.

Conclusions:

The Heisenberg Effect significantly impacts bare-hand VR interactions.
Input modality and selection mechanism influence susceptibility to the Heisenberg Effect.
Weighted VOTE offers a promising approach for adaptive target selection in VR, enhancing accuracy by accounting for interaction history.