HEMIFIELD DIFFERENCES IN PERCEIVED SPATIAL-FREQUENCY
HEMIFIELD DIFFERENCES IN PERCEIVED SPATIAL-FREQUENCY
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DOI：
10.1068/p190759
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发表时间：
1990-01-01
期刊：
影响因子：
1.7
通讯作者：
SMITH, AT
中科院分区：
文献类型：
--
作者：
EDGAR, GK;SMITH, AT
固定正弦波光栅的感知空间频率的测量与光栅在左，右，上，下视觉半野相同的偏心率。 10名受试者进行的任务双眼与空间频率的1，2，和4个周期度-1。 其中两名受试者还以2个周期度-1单眼执行任务。 在大多数情况下，相对于在右侧和上部视觉半野中呈现的刺激，在左侧和下部视觉半野中呈现的刺激的空间频率被高估。 所有测试的空间频率的结果都是相似的，并且无论是用左眼、右眼还是双眼观看，不对称的方向都是相同的，这表明感知空间频率的差异不是视网膜起源的。
Measurements of the perceived spatial frequency of stationary sinewave gratings were made with the gratings presented at the same eccentricity in the left, right, upper, and lower visual hemifields. Ten subjects performed the task binocularly with spatial frequencies of 1, 2, and 4 cycles deg-1. Two of these subjects also performed the task monocularly at 2 cycles deg-1. In the majority of cases, the spatial frequency of stimuli presented in the left and lower visual hemifields was overestimated relative to stimuli presented in the right and upper visual hemifields. The results were similar for all spatial frequencies tested, and the direction of the asymmetry was the same whether viewing was with the left eye, right eye or binocular, suggesting that differences in perceived spatial frequency are not retinal in origin.