INFANT CHROMATIC AND LUMINANCE CONTRAST SENSITIVITY

我们建议扩展我们的基础知识和理论 对色觉发展的三个基本认识 实验。 首先，我们计划测量色度和亮度对比度 阈值作为年龄的函数。我们将密切关注事态的发展 从大约3个月大时开始的颜色视觉到 每当获得成人般的色觉时。相对汇率 色度和亮度对比敏感度的显影可以 有助于我们理解为什么年轻人的色觉 婴儿太穷了。 其次，我们计划比较色度和亮度对比度 使用正弦光栅刺激测量灵敏度(通常 刺激)并且测量了色度和亮度对比度刺激 使用边缘刺激，一种越来越多地被用于 视觉研究。这将有助于我们理解两者之间的关系 发育过程中的色觉和空间视觉。很有可能 这种边缘刺激有朝一日可能会被用于临床测试 婴儿，如果是这样，来自这种类型的基本信息 实验将是重要的。 第三，我们计划测量白人和白人之间的歧视阈值 以及在亮度和/或激发纯度上不同于 白色。作为年龄的函数来衡量，这些阈值将告诉我们 美国婴儿的色觉是否与 这是成年人的问题，还是只是总体上不那么敏感。 另一组阈值将测量 个体受体机制，并与 第一个实验，将帮助我们得出一个定量的 了解婴儿色觉差的原因。

We propose to extend our basic knowledge and theoretical understanding of color vision development with three basic experiments. First, we plan to measure chromatic and luminance contrast thresholds as a function of age. We will follow the development of color vision from its inception at about age 3 months to whenever adult-like color vision is attained. The relative rates of development of chromatic and luminance contrast sensitivity may contribute to our understanding of why the color vision of young infants is so poor. Second, we plan to compare chromatic and luminance contrast sensitivity measured using sinusoidal grating stimuli (the usual stimulus) with chromatic and luminance contrast stimuli measured using edge stimuli, a stimulus that is increasingly being used in vision research. This will help us understand the relation between color vision and spatial vision during development. It is likely that edge stimuli could some day be used in clinical testing of infants, and if so the basic information from this kind of experiment will be important. Third, we plan to measure discrimination thresholds between white and stimuli differing in luminance and/or excitation purity from white. Those thresholds, measured as a function of age, will tell us whether the color vision of infants differs qualitatively from that of adults, or whether it is just uniformly less sensitive. Another set of those thresholds will measure the sensitivity of the individual receptor mechanisms, and, together with the results of the first experiment, will help us arrive at a quantitative understanding of why infants' color vision is poor.