The processing of a visual stimulus is known to be influenced by the statistics in recent visual history and by the stimulus' visual surround. Such contextual influences lead to perceptually salient phenomena, such as the tilt aftereffect and the tilt illusion. Despite much research on the influence of an isolated context, it is not clear how multiple, possibly competing sources of contextual influence interact. Here, using psychophysical methods, we compared the combined influence of multiple contexts to the sum of the isolated context influences. The results showed large deviations from linear additivity for adjacent or overlapping contexts, and remarkably, clear additivity when the contexts were sufficiently separated. Specifically, for adjacent or overlapping contexts, the combined effect was often lower than the sum of the isolated component effects (sub-additivity), or was more influenced by one component than another (selection). For contexts that were separated in time (600 ms), the combined effect measured the exact sum of the isolated component effects (in degrees of bias). Overall, the results imply an initial compressive transformation during visual processing, followed by selection between the processed parts.

中文翻译：

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上下文相关的方向估计中的上下文交互。

已知视觉刺激的处理受最近视觉历史中的统计数据和刺激的视觉周围环境的影响。这种上下文影响会导致感知上的显着现象，例如倾斜后效应和倾斜幻觉。尽管对孤立环境的影响进行了大量研究，但尚不清楚多个可能相互竞争的环境影响源如何相互作用。在这里，我们使用心理物理学方法，将多个情境的综合影响与孤立情境影响的总和进行了比较。结果显示，对于相邻或重叠上下文，线性可加性存在较大偏差；当上下文被充分分离时，明显可加性明显。具体来说，对于相邻或重叠的上下文，组合效应通常低于孤立成分效应的总和（次可加性），或者受一种成分的影响大于另一种成分的影响（选择）。对于时间上分离的上下文（600毫秒），组合效果测量的是孤立组件效果的精确总和（以偏差度为单位）。总体而言，结果表明在视觉处理过程中会进行初始压缩转换，然后在已处理零件之间进行选择。