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首页> 外文期刊>Journal of vision >Differential changes in human perception of speed due to motion adaptation
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Differential changes in human perception of speed due to motion adaptation

机译：由于运动适应，人类对速度的感知有所不同

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Visual systems adapt to the prevailing image conditions. This improves the ability to discriminate between two similar stimuli but has the side effect that veridical perception is degraded. For example, prolonged driving at 100 km/h may reduce the perceived speed to 80 km/h but improve the sensitivity to changes in the prevailing speed. Here we use radially expanding flow fields with a wide combination of adapt and test speeds to study human speed perception. Adaptation at speeds higher than the test always attenuates perceived speed, whereas adaptation at low and testing at high speeds increases perceived speed. We show that adaptation is stronger (i.e., post-adaptation speeds are perceived as slower) when the dots in the expanding flow field accelerate towards the periphery rather than traveling at constant speeds. We also show that speed discriminability is reduced following adaptation to low speeds when tested at high speeds and increased when the test speed is at or below prior adaptation speeds. We conclude that the relative speeds of the adaptation and test patterns are important parameters governing speed-related adaptation effects in the human brain.
机译：视觉系统适应当前的图像条件。这提高了区分两个相似刺激的能力，但是具有垂直感觉下降的副作用。例如，以100 km / h的速度长时间行驶可能会将感知速度降低到80 km / h，但会提高对当前速度变化的敏感性。在这里，我们使用径向扩展的流场以及适应和测试速度的广泛组合来研究人类的速度感知。高于测试的速度适应总是削弱感知速度，而低速和高速测试适应会提​​高感知速度。我们显示出，当扩展流场中的点朝着外围加速而不是以恒定速度行进时，适应性更强（即适应后的速度被认为更慢）。我们还表明，在高速测试时，适应低速后，速度可分辨性降低，而在测试速度等于或低于先前的适应速度时，可分辨性则提高。我们得出的结论是，适应和测试模式的相对速度是控制人脑中与速度相关的适应效应的重要参数。

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