Linear Summation of Repulsive and Attractive Serial Dependencies: Orientation and Motion Dependencies Sum in Motion Perception
Linear Summation of Repulsive and Attractive Serial Dependencies: Orientation and Motion Dependencies Sum in Motion Perception
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DOI：
10.1523/jneurosci.4601-15.2017
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发表时间：
2017-04-19
影响因子：
5.3
通讯作者：
Van der Burg, Erik
中科院分区：
文献类型：
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作者：
Alais, David;Leung, Johahn;Van der Burg, Erik
几个研究小组最近的研究表明，在给定的时刻，人类观察者对各种视觉属性的感知偏向于最近看到的东西。这种正序列依赖性是一种时间平均，它利用视觉场景中的短期相关性来减少噪声并稳定感知。到目前为止，这种稳定的“连续性场”已被证明是稳定的视觉属性，如方向和人脸识别，但它会适得其反，将其应用到动态属性，其中需要变化的敏感性。在这里，我们使用运动方向辨别测试了这一点，并预测了一个负面的感知依赖性：一个对比关系，提高了对变化的敏感性。令人惊讶的是，我们的数据显示出一种类似于正向和负向的依赖模式。通过交错各种刺激组合，我们分离的组件和隔离的积极知觉依赖运动和方向的负面依赖。独立依赖关系的加权线性和很好地描述了原始立方模式。运动的积极依赖性显示了一种整合的知觉效应，这是出乎意料的，尽管它与运动启动的工作是一致的。这些发现表明，一个知觉稳定连续性领域普遍存在，即使它掩盖了对动态刺激的敏感性。
Recent work from several groups has shown that perception of various visual attributes in human observers at a given moment is biased toward what was recently seen. This positive serial dependency is a kind of temporal averaging that exploits short-term correlations in visual scenes to reduce noise and stabilize perception. To date, this stabilizing "continuity field" has been demonstrated on stable visual attributes such as orientation and face identity, yet it would be counterproductive to apply it to dynamic attributes in which change sensitivity is needed. Here, we tested this using motion direction discrimination and predict a negative perceptual dependency: a contrastive relationship that enhances sensitivity to change. Surprisingly, our data showed a cubic-like pattern of dependencies with positive and negative components. By interleaving various stimulus combinations, we separated the components and isolated a positive perceptual dependency for motion and a negative dependency for orientation. A weighted linear sum of the separate dependencies described the original cubic pattern well. The positive dependency for motion shows an integrative perceptual effect and was unexpected, although it is consistent with work on motion priming. These findings suggest that a perception-stabilizing continuity field occurs pervasively, occurring even when it obscures sensitivity to dynamic stimuli.