运动信号介导静态感知。

IF 1.8 4区 心理学 Q3 BIOPHYSICS
Savannah Halow, James Liu, Eelke Folmer, Paul R MacNeilage
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引用次数: 0

摘要

头部相对于静止环境的运动产生一致的前庭和视觉光流信号。由此产生的对静止视觉环境的感知,在本文中称为平稳感知,取决于比较视觉和前庭信号以评估其一致性的机制。在这里,我们研究了这些机制的功能及其对固定行为的依赖性,以及头部运动的主动与被动性质。在个体试验中,通过修改视觉运动相对于头部运动的增益来测量静态感知,并要求受试者报告增益是过低还是过高。将心理测量函数拟合到数据中会产生两个关键的性能参数。平均值是精度的度量,标准差是精度的衡量。实验使用头戴式显示器进行,该显示器的注视行为由嵌入式眼动仪监测。在活动状态下,受试者将头部偏转约15°/s,超过约1秒。在被动状态下,每个受试者的动作都被记录下来,并通过旋转椅子回放。在头部固定和场景固定固定期间,固定目标分别随着头部或场景移动。主动式头部运动的精度和准确性都优于被动式头部运动,这可能是由于运动预测和颈部本体感觉提高了头部运动估计的精度。在场景固定期间的性能也比头部固定期间更好,这可能是由于视网膜图像运动的速度降低和视网膜图像运动估计的精度提高。这些结果揭示了头部和眼睛运动的性质如何介导相关感觉和运动信号的编码、处理和比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Motor Signals Mediate Stationarity Perception.

Head movement relative to the stationary environment gives rise to congruent vestibular and visual optic-flow signals. The resulting perception of a stationary visual environment, referred to herein as stationarity perception, depends on mechanisms that compare visual and vestibular signals to evaluate their congruence. Here we investigate the functioning of these mechanisms and their dependence on fixation behavior as well as on the active versus passive nature of the head movement. Stationarity perception was measured by modifying the gain on visual motion relative to head movement on individual trials and asking subjects to report whether the gain was too low or too high. Fitting a psychometric function to the data yields two key parameters of performance. The mean is a measure of accuracy, and the standard deviation is a measure of precision. Experiments were conducted using a head-mounted display with fixation behavior monitored by an embedded eye tracker. During active conditions, subjects rotated their heads in yaw ∼15 deg/s over ∼1 s. Each subject's movements were recorded and played back via rotating chair during the passive condition. During head-fixed and scene-fixed fixation the fixation target moved with the head or scene, respectively. Both precision and accuracy were better during active than passive head movement, likely due to increased precision on the head movement estimate arising from motor prediction and neck proprioception. Performance was also better during scene-fixed than head-fixed fixation, perhaps due to decreased velocity of retinal image motion and increased precision on the retinal image motion estimate. These results reveal how the nature of head and eye movements mediate encoding, processing, and comparison of relevant sensory and motor signals.

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来源期刊
Multisensory Research
Multisensory Research BIOPHYSICS-PSYCHOLOGY
CiteScore
3.50
自引率
12.50%
发文量
15
期刊介绍: Multisensory Research is an interdisciplinary archival journal covering all aspects of multisensory processing including the control of action, cognition and attention. Research using any approach to increase our understanding of multisensory perceptual, behavioural, neural and computational mechanisms is encouraged. Empirical, neurophysiological, psychophysical, brain imaging, clinical, developmental, mathematical and computational analyses are welcome. Research will also be considered covering multisensory applications such as sensory substitution, crossmodal methods for delivering sensory information or multisensory approaches to robotics and engineering. Short communications and technical notes that draw attention to new developments will be included, as will reviews and commentaries on current issues. Special issues dealing with specific topics will be announced from time to time. Multisensory Research is a continuation of Seeing and Perceiving, and of Spatial Vision.
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