van Beek Femke E, Kuling Irene A, Brenner Eli, Bergmann Tiest Wouter M, Kappers Astrid M L
MOVE Research Institute Amsterdam, Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
PLoS One. 2016 Jul 20;11(7):e0158709. doi: 10.1371/journal.pone.0158709. eCollection 2016.
Visuo-haptic biases are observed when bringing your unseen hand to a visual target. The biases are different between, but consistent within participants. We investigated the usefulness of adjusting haptic guidance to these user-specific biases in aligning haptic and visual perception. By adjusting haptic guidance according to the biases, we aimed to reduce the conflict between the modalities. We first measured the biases using an adaptive procedure. Next, we measured performance in a pointing task using three conditions: 1) visual images that were adjusted to user-specific biases, without haptic guidance, 2) veridical visual images combined with haptic guidance, and 3) shifted visual images combined with haptic guidance. Adding haptic guidance increased precision. Combining haptic guidance with user-specific visual information yielded the highest accuracy and the lowest level of conflict with the guidance at the end point. These results show the potential of correcting for user-specific perceptual biases when designing haptic guidance.
当将你看不见的手移向视觉目标时，会观察到视觉-触觉偏差。这些偏差在不同参与者之间存在差异，但在参与者内部是一致的。我们研究了根据这些特定于用户的偏差调整触觉引导在对齐触觉和视觉感知方面的有用性。通过根据偏差调整触觉引导，我们旨在减少模态之间的冲突。我们首先使用自适应程序测量偏差。接下来，我们在指向任务中测量了三种条件下的表现：1）根据特定于用户的偏差调整的视觉图像，无触觉引导；2）真实视觉图像与触觉引导相结合；3）偏移的视觉图像与触觉引导相结合。添加触觉引导提高了精度。将触觉引导与特定于用户的视觉信息相结合，在终点处产生了最高的准确性和与引导的最低冲突水平。这些结果表明了在设计触觉引导时校正特定于用户的感知偏差的潜力。
