Does the noise matter? Effects of different kinematogram types on smooth pursuit eye movements and perception.
Does the noise matter? Effects of different kinematogram types on smooth pursuit eye movements and perception.
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DOI：
10.1167/10.13.26
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发表时间：
2010-11-01
影响因子：
1.8
通讯作者：
Gegenfurtner KR
中科院分区：
文献类型：
--
作者：
Schütz AC;Braun DI;Movshon JA;Gegenfurtner KR
我们研究了人类视觉系统和追踪系统对视觉运动噪声的反应。我们提出了三种不同类型的随机点运动图在五个不同的连贯性水平。对于透明运动，每个点上的信号和噪声标签在每次试验中都被保留，噪声点以与信号点相同的速度移动，但方向是固定的随机方向。对于白色噪声运动，每20 ms将信号和噪声标签随机分配给每个点，并且噪声点出现在随机位置。对于布朗运动，信号和噪声标签也是随机分配的，但噪声点以信号速度移动，方向随机变化。无论是追求潜伏期，也没有早期的眼睛加速度不同的不同类型的运动图。后期加速度，追求增益和感知速度都依赖于运动图类型，追求增益和感知速度之间有很好的一致性。对于透明运动，追求增益和感知速度是独立的相干水平。对于白色和布朗运动，追求增益和感知速度增加的连贯性，但白色高于布朗运动。这表明，在我们的条件下，追踪系统在所有运动方向上都是积分的，但在所有速度上都不是。
We investigated how the human visual system and the pursuit system react to visual motion noise. We presented three different types of random-dot kinematograms at five different coherence levels. For transparent motion, the signal and noise labels on each dot were preserved throughout each trial, and noise dots moved with the same speed as the signal dots but in fixed random directions. For white noise motion, every 20 ms the signal and noise labels were randomly assigned to each dot and noise dots appeared at random positions. For Brownian motion, signal and noise labels were also randomly assigned, but the noise dots moved at the signal speed in a direction that varied randomly from moment to moment. Neither pursuit latency nor early eye acceleration differed among the different types of kinematograms. Late acceleration, pursuit gain, and perceived speed all depended on kinematogram type, with good agreement between pursuit gain and perceived speed. For transparent motion, pursuit gain and perceived speed were independent of coherence level. For white and Brownian motions, pursuit gain and perceived speed increased with coherence but were higher for white than for Brownian motion. This suggests that under our conditions, the pursuit system integrates across all directions of motion but not across all speeds.
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影响因子：
1.8
作者：
KELLER, EL;KHAN, NS
通讯作者：
KHAN, NS
影响因子：
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作者：
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