Wilkinson F
Department of Psychology, McGill University, Montreal, Que., Canada.
Behav Brain Res. 1995 Jun;68(2):185-99. doi: 10.1016/0166-4328(94)00173-d.
A forced-choice preferential looking paradigm, similar to that developed for human infants, was used to assess visual thresholds in kittens between 21 and 45 days of age. In agreement with the earlier work of Sireteanu [19,30], the technique was found to be successful for grating acuity measurement. Acuity for square wave gratings (vs. matched greys) increased from 0.12 cycles/degrees at 21 days to 1.6 cycles/degrees at 40 days of age. Comparable results were obtained at three viewing distances: 20, 40, and 60 cm, indicating that accommodation is not a limiting factor in spatial resolution over this range of distances. Kittens also showed preferences for texture arrays with strong oriented components and 'texture acuities' were found to be comparable to acuity for square wave gratings. A consistent orientation anisotropy favouring horizontal line elements was seen in very young kittens but disappeared by 5 weeks of age. Preferences for texture arrays composed of dots were much weaker and thresholds could not be determined in all cases. The results are discussed in the context of the Banks and Ginsberg [2] model of infant preferences.
一种类似于为人类婴儿开发的迫选偏好注视范式，被用于评估21至45日龄小猫的视觉阈值。与西雷塔努[19,30]早期的研究一致，该技术被发现可成功用于测量光栅敏锐度。方波光栅（与匹配的灰色相比）的敏锐度从21日龄时的0.12周/度增加到40日龄时的1.6周/度。在三个观察距离（20、40和60厘米）处获得了可比的结果，这表明在该距离范围内，调节不是空间分辨率的限制因素。小猫也表现出对具有强烈定向成分的纹理阵列的偏好，并且发现“纹理敏锐度”与方波光栅的敏锐度相当。在非常年幼的小猫中观察到一致的方向各向异性，有利于水平线元素，但到5周龄时消失。对由点组成的纹理阵列的偏好要弱得多，并且在所有情况下都无法确定阈值。将在班克斯和金斯伯格[2]的婴儿偏好模型的背景下讨论这些结果。
