Visual motion processing in one-month-old infants: Preferential looking experiments
Visual motion processing in one-month-old infants: Preferential looking experiments
复制标题
一个月大婴儿的视觉运动处理：偏好观察实验
DOI：
10.1016/0042-6989(95)00236-7
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发表时间：
1996
期刊：
影响因子：
1.8
通讯作者：
J. Wattam
中科院分区：
文献类型：
--
作者：
J. Wattam
婴儿区分相反运动方向的能力是通过在随机点图案和均匀图案之间进行强制选择优先观察来评估的，随机点图案被分成沿相反方向移动的区域，而均匀图案中所有点都沿相同方向移动。第一个实验测量了方向辨别的速度阈值（νmin 和 νmax）；第 10 至 13 周期间，νmin 减少，同时 νmax 增加。第二个实验探讨了这种扩大的速度范围对年幼婴儿方向辨别的可能影响。在 1-43 度/秒范围内的许多测试速度中，一个月大的婴儿都没有表现出方向辨别的证据。 1 个月大的孩子还接受了两个附加条件的测试：它们可以区分速度为 10 度/秒或以上的运动模式和静态模式，还可以区分速度为 21 度/秒或以下的连贯运动和非连贯运动。这些区别都不依赖于对相干运动方向的敏感性。结果表明，1 个月大的婴儿可能对视觉运动的方向不敏感。
The ability of infants to discriminate between opposite directions of motion was assessed using forced-choice preferential looking between a random-dot pattern which was segregated into regions which moved in opposite directions, and a uniform pattern in which all the dots moved in the same direction. The first experiment measured velocity thresholds ( νminand νmax) for direction discrimination; between 10 and 13 weeks νmindecreased, while at the same time νmaxincreased. The second experiment explored possible implications of this expanding velocity range for direction discrimination by younger infants. One-month-olds showed no evidence for direction discrimination at any of a number of test velocities in the range 1–43 deg/sec. The 1-month-olds were also tested with two additional conditions: they could discriminate between moving and static patterns at velocities of 10 deg/sec or above, and they could also discriminate between coherent and incoherent motion at velocities of 21 deg/sec or below. Neither of these discriminations depends on sensitivity to the direction of the coherent motion. The results suggest that 1-month-olds may not be sensitive to the direction of visual motion.