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首页> 外文期刊>Vision Research: An International Journal in Visual Science >The transition from scotopic to photopic vision in 3-month-old infants and adults: an evaluation of the rod dominance hypothesis.
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The transition from scotopic to photopic vision in 3-month-old infants and adults: an evaluation of the rod dominance hypothesis.

机译：在3个月大的婴儿和成人中，从暗视到明视的过渡：视杆优势假设的评估。

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The scotopic to photopic transition was tested in adults and 12-week-old infants using a large field motion nulling technique at a series of luminances between -3.57 and 2.70 log cd m(-2). The stimuli were composed of 0.25 cyc deg(-1), 5.6 Hz blue/black and yellow/black sinusoidal grating components, superimposed and moving in opposite directions. The contrasts of the two components were traded off to determine motion nulls at each luminance level. An eye movement based response measure was used for infant subjects, whereas self-report was used in adults. In both age groups, the motion null values approached a scotopic asymptote consistent with V'(lambda) at the lowest luminance levels, and a photopic asymptote consistent with V(10)(lambda) at the highest luminance levels. The scotopic to photopic transition was gradual and occurred over about 3 log units between about -2 and 1 log cd m(-2) in both groups. The null values for infants and adults were highly similar at each luminance level, and the shapes of the transition curves were virtually identical at the two ages. These data suggest that at each different luminance level, the balance between rod-initiated and cone-initiated signals in the extrafoveal luminance channel is similar or identical in 12-week-old infants and adults.
机译：在大范围运动归零技术下，在一系列亮度介于-3.57和2.70 log cd m（-2）之间的情况下，对成年人和12周大的婴儿进行了暗视到明视过渡的测试。刺激是由0.25 cyc deg（-1），5.6 Hz的蓝/黑和黄/黑正弦光栅组成，它们叠加并沿相反的方向移动。权衡这两个分量的对比度，以确定每个亮度级别的运动零点。基于眼动的反应量度用于婴儿受试者，而自我报告用于成人。在两个年龄组中，运动零值在最低亮度水平下都接近与V'（lambda）一致的暗视渐近线，而在最高亮度水平下接近与V（10）（lambda）一致的明视渐近线。暗视到暗视的过渡是逐渐的，并且在两组中的大约-3和1 log cd m（-2）之间发生了大约3 log个单位。婴儿和成人的零值在每个亮度水平上都非常相似，并且过渡曲线的形状在两个年龄段几乎相同。这些数据表明，在每个不同的亮度水平下，小凹腔外亮度通道中杆声和圆锥声信号之间的平衡在12周龄的婴儿和成人中相似或相同。

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