婴儿对正弦光栅的运动阈值。
Motion thresholds in infants to sinusoidal gratings.
作者信息
Finlay D C, Chorlton M C, Boulton J C
机构信息
Department of Psychology, University of Newcastle, Australia.
出版信息
J Gen Psychol. 1991 Jul;118(3):263-70. doi: 10.1080/00221309.1991.9917785.
Motion thresholds were determined at 9 degrees eccentricity in infants (mean = 14 weeks old). The stimuli used were computer-generated sinusoidal gratings presented through a 7.45 degrees aperture at a contrast ratio of .83. The range of velocities (.5, 1, 2, 4, and 6 degrees per s) was examined at only one spatial frequency (1 cycle per degree). At low velocities (less than 2 degrees per s), the infants showed no clear preference for the moving stimulus over the stationary stimulus. At faster velocities (2-6 degrees per s), the infants exhibited a clear preference for the moving stimulus. The results were interpreted as indicating that infants at 3 months of age are relatively insensitive to slow motions for low spatial frequency stimuli.
在婴儿（平均年龄为14周）中，于9度偏心率处测定运动阈值。所使用的刺激是通过一个7.45度孔径以0.83的对比度呈现的计算机生成的正弦光栅。仅在一个空间频率（每度1个周期）下检查了速度范围（每秒0.5、1、2、4和6度）。在低速（每秒小于2度）时，婴儿对移动刺激相对于静止刺激没有明显偏好。在较快速度（每秒2 - 6度）时，婴儿对移动刺激表现出明显偏好。这些结果被解释为表明3个月大的婴儿对低空间频率刺激的慢动作相对不敏感。
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