Necessity of spatial pooling for the perception of heading in nonrigid environments
Necessity of spatial pooling for the perception of heading in nonrigid environments
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DOI：
10.1037//0096-1523.28.5.1192
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发表时间：
2002-10-01
影响因子：
2.1
通讯作者：
Saidpour, A
中科院分区：
文献类型：
--
作者：
Andersen, GJ;Saidpour, A
本研究探讨了航向的感知是否由空间汇集速度信息决定。观察者看到的显示器模拟观察者通过一个体积的3-D物体的运动。为了测试空间汇集的重要性，作者使用两种类型的物体运动系统地改变了流场的非刚性：为每个物体添加独特的旋转或平移。信噪比（观察者速度与物体运动）的计算表明，当物体旋转的信噪比为0.39，物体平移的信噪比为0.45时，性能没有下降。性能也随着场景中对象的数量而提高。这些结果表明，标题是由机制，使用空间汇集在大区域。
This study examined whether the perception of heading is determined by spatially pooling velocity information. Observers were presented displays simulating observer motion through a volume of 3-D objects. To test the importance of spatial pooling, the authors systematically varied the nonrigidity of the flow field using two types of object motion: adding a unique rotation or translation to each object. Calculations of the signal-to-noise (observer velocity-to-object motion) ratio indicated no decrements in performance when the ratio was .39 for object rotation and .45 for object translation. Performance also increased with the number of objects in the scene. These results suggest that heading is determined by mechanisms that use spatial pooling over large regions.