Gayl I E, Roberts J O, Werner J S
J Exp Child Psychol. 1983 Feb;35(1):30-45. doi: 10.1016/0022-0965(83)90068-1.
Karmel's check-pattern preference data for 13-week-old infants were reanalyzed using linear systems analysis. The two-dimensional Fourier amplitude spectrum was calculated for each of his eight checkerboard and random check patterns. The mean contrast sensitivity data for 3-month-old infants of Banks and Salapatek and the spatial frequency amplitudes of the patterns were used to derive three metrics to predict the looking times observed by Karmel. One was based on the sensitivity of the visual system to the single pattern component highest above threshold (maximum amplitude), the second was based on the total amount of pattern energy above threshold (total summation), and the third was based on the maximum amplitude with summation over nearby spatial frequency components (limited summation). The predictive power of the maximum amplitude and the total summation metrics depended on whether the pattern type was checkerboard or random check. The limited summation metric predicted looking times well for both pattern types. A linear function of the logarithm of the limited summation metric accounted for 91% of the total variance in looking time.
利用线性系统分析重新分析了卡梅尔关于13周龄婴儿的棋盘格偏好数据。为他的八个棋盘格和随机方格图案分别计算了二维傅里叶振幅谱。班克斯和萨拉帕特克研究的3个月大婴儿的平均对比敏感度数据以及图案的空间频率振幅被用于推导三个指标，以预测卡梅尔观察到的注视时间。一个基于视觉系统对高于阈值的单个图案成分的敏感度（最大振幅），第二个基于高于阈值的图案能量总量（总和），第三个基于对附近空间频率成分求和的最大振幅（有限总和）。最大振幅和总和指标的预测能力取决于图案类型是棋盘格还是随机方格。有限总和指标对两种图案类型的注视时间都预测得很好。有限总和指标对数的线性函数解释了注视时间总方差的91%。
