Asymmetries in the discrimination of motion direction around the visual field.

Asymmetries in the discrimination of motion direction around the visual field.
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DOI:
10.1167/jov.23.3.19
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发表时间:
2023-03-01
期刊:
影响因子:
1.8
通讯作者:
--
中科院分区:
医学4区
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--
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运动方向的可辨别性是不对称的,其中一些运动方向比其他运动方向更好地辨别。例如,对主轴附近的方向(向上/向下/垂直/垂直)的辨别往往比倾斜方向更好。在这里,我们测试了在多个极角位置处的多个运动方向的可辨别性。我们发现了三个系统性的不对称。首先,我们发现了一个大的基数优势,在一个基数参考帧-更好的辨别力附近的运动基数参考方向比倾斜方向。其次,我们发现了一个中等的基数优势,在极坐标系-更好的辨别力的运动附近的径向(向内/向外)和切向(顺时针/逆时针)的参考方向比其他方向。第三,我们发现,与切向参考方向相比,径向附近的辨别运动有一个小的优势。这三个优点以近似线性的方式联合收割机组合,并且一起预测作为运动方向和视野周围的位置两者的函数的运动辨别的变化。例如,对于水平和垂直子午线上的径向运动发现最佳性能,因为这些方向包含所有三个优点,而对于位于水平和垂直子午线上的倾斜运动刺激发现最差性能,因为这些方向包含所有三个缺点。我们的研究结果限制了运动感知模型,并表明在视觉处理层次的多个阶段的参考帧限制性能。
The discriminability of motion direction is asymmetric, with some motion directions that are better discriminated than others. For example, discrimination of directions near the cardinal axes (upward/downward/leftward/rightward) tends to be better than oblique directions. Here, we tested discriminability for multiple motion directions at multiple polar angle locations. We found three systematic asymmetries. First, we found a large cardinal advantage in a cartesian reference frame – better discriminability for motion near cardinal reference directions than oblique directions. Second, we found a moderate cardinal advantage in a polar reference frame – better discriminability for motion near radial (inward/outward) and tangential (clockwise/counterclockwise) reference directions than other directions. Third, we found a small advantage for discriminating motion near radial compared to tangential reference directions. The three advantages combine in an approximately linear manner, and together predict variation in motion discrimination as a function of both motion direction and location around the visual field. For example, best performance is found for radial motion on the horizontal and vertical meridians, as these directions encompass all three advantages, whereas poorest performance is found for oblique motion stimuli located on the horizontal and vertical meridians, as these directions encompass all three disadvantages. Our results constrain models of motion perception and suggest that reference frames at multiple stages of the visual processing hierarchy limit performance.
DOI: 10.1016/j.visres.2004.11.025
发表时间: 2005-06-01
期刊: VISION RESEARCH
影响因子: 1.8
作者:
Beardsley, SA;Vaina, LA
通讯作者: Vaina, LA
DOI: 10.1007/bf00248906
发表时间: 1989-01-01
影响因子: 2
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通讯作者: DOW, BM
DOI: 10.1016/s0896-6273(03)00145-4
发表时间: 2003-03-27
期刊: NEURON
影响因子: 16.2
作者:
Churchland, AK;Gardner, JL;Lisberger, SG
通讯作者: Lisberger, SG
DOI: 10.1017/s0952523800012037
发表时间: 1989-01-01
影响因子: 1.9
作者:
ALBRIGHT, TD
通讯作者: ALBRIGHT, TD
DOI: 10.1016/s0042-6989(00)00276-5
发表时间: 2001-02-01
期刊: VISION RESEARCH
影响因子: 1.8
作者:
Burr, DC;Badcock, DR;Ross, J
通讯作者: Ross, J