Detection of vernier and contrast-modulated stimuli with equal Fourier energy spectra by infants and adults.
Detection of vernier and contrast-modulated stimuli with equal Fourier energy spectra by infants and adults.
复制标题
检测婴儿和成人具有相等傅里叶能谱的游标和对比调制刺激。
DOI：
10.1167/5.3.7
复制
发表时间：
2005
影响因子：
1.8
通讯作者：
Lindsey,DelwinT
中科院分区：
文献类型：
--
作者：
Brown,AngelaM;Adusumilli,Veena;Lindsey,DelwinT
婴儿和成人游标敏锐度不同的因素只有4至6时，刺激是周期性的，结果表示在单位的空间相位。这个比率远小于当我们以视角中的阈值空间位移表示我们的结果和其他人的结果时获得的50到100的因子。我们比较了婴儿和成人游标性能的“基准”对比度歧视任务，游标和对比度歧视刺激包含相同的傅立叶对比度光谱的性能。当我们比较游标性能直接对比辨别性能，婴儿和成人的数据是非常相似的，这表明视觉系统的相似部分限制游标和对比性能的两个年龄段的受试者。对成年人的对照实验表明，对比度辨别任务的上级性能是由于招聘的视觉模式分析仪位于距离的相位和对比度的不连续性。
Infant and adult vernier acuity differed by a factor of only 4 to 6 when the stimuli were periodic and results were expressed in units of spatial phase. This ratio was much smaller than the factor of 50 to 100 obtained when we expressed our results and those of others in terms of the threshold spatial displacement in visual angle. We compared infant and adult vernier performance to performance on a “benchmark” contrast discrimination task, where the vernier and contrast discrimination stimuli contained identical Fourier contrast spectra. When we compared vernier performance directly to contrast discrimination performance, infant and adult data were remarkably similar, suggesting that similar parts of the visual system limit vernier and contrast performance of subjects of both ages. A control experiment on adults suggested that the superior performance of the contrast discrimination task is due to recruitment of visual pattern analyzers situated at a distance from the discontinuities in phase position and contrast.