Local motion pooling is continuous, global motion perception is discrete.
Local motion pooling is continuous, global motion perception is discrete.
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DOI：
10.1037/xhp0000971
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发表时间：
2022-01
影响因子：
2.1
通讯作者：
Pratte, Michael S.
中科院分区：
文献类型：
--
作者：
Green, Marshall L.;Pratte, Michael S.
感知物体的运动被认为包括两个阶段：在空间的每个点测量局部运动能量，然后将这些信号汇集在空间中以构建连贯的全局运动。关于局部到全局池化是如何发生的有几种理论，但它们都预测全局运动感知是一个连续的过程，因此增加运动能量的强度应该会逐渐提高感知运动方向的精度。我们针对全局运动感知是离散的替代方案测试了这一预测：运动要么被高精度地感知，要么完全无法被感知。来自人类观察者的数据提供了明确的证据，尽管汇集局部运动能量是连续的，但将局部信号分割成连贯的全局运动模式是一个离散的过程。这一结果将运动感知添加到越来越多的过程列表中，这些过程显示出全有或无视觉意识的证据。
Perceiving the motion of an object is thought to involve two stages: Local motion energy is measured at each point in space, and these signals are then pooled across space to build coherent global motion. There are several theories of how local-to-global pooling occurs, but they all predict that global motion perception is a continuous process, such that increasing the strength of motion energy should gradually increase the precision of perceived motion directions. We test this prediction against the alternative that global motion perception is discrete: Motion is either perceived with high precision or fails to be perceived altogether. Data from human observers provides clear evidence that, whereas pooling local motion energy is continuous, the segmentation of local signals into coherent global motion patterns is a discrete process. This result adds motion perception to the growing list of processes that exhibit evidence of all-or-none visual awareness.
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