Contrast coding and magno/parvo segregation revealed in reaction time studies

Contrast coding and magno/parvo segregation revealed in reaction time studies
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反应时间研究中揭示的对比编码和细小分离

DOI:
10.1016/s0042-6989(03)00408-5
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发表时间:
2003
期刊:
影响因子:
1.8
通讯作者:
S. Plainis
S. Plainis
中科院分区:
心理学3区
文献类型:
--
作者:
I. Murray;S. Plainis

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获得各种垂直正弦光栅对比度的反应时间 (RT)。将数据绘制为对比度倒数的函数。在某些情况下,单个线性函数可以解释数据。在其他情况下,获得了清晰的双线性函数。该函数的低对比度区域和高对比度区域分别被解释为代表Magno和Parvo活动。针对不同的亮度、刺激持续时间和偏心率获得基于 RT 的超阈值灵敏度函数,并将这些函数与传统的基于阈值的灵敏度进行比较,以确定 RT 和对比灵敏度受相同感觉过程约束的程度。
Reaction times (RTs) are obtained for a wide range of contrasts of vertical sinusoidal gratings. The data are plotted as a function of the reciprocal of contrast. In some conditions, a single linear function accounts for the data. In others a clear bi-linear function is obtained. The low and high contrast regions of the function are interpreted as representing magno and parvo activity, respectively. RT-based supra-threshold sensitivity functions are obtained for different luminances, stimulus durations and eccentricities and these are compared with conventional threshold-based sensitivities to establish the extent to which RTs and contrast sensitivity are constrained by the same sensory processes.
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DOI: --
发表时间: 1995
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