Arditi A, Holtzman J D, Kosslyn S M
Vision Research Laboratory, The Lighthouse, New York, NY 10022.
Neuropsychologia. 1988;26(1):1-12. doi: 10.1016/0028-3932(88)90026-7.
Imagery of congenitally blind and normally sighted subjects was compared in two experiments. In the first, subjects were asked to estimate how far away objects appeared in images. The results showed that blind subjects imaged objects "within arms' reach", and with only a slight tendency to image larger objects farther from them. In contrast, sighted subjects tended to image larger objects as if they were farther away. In addition, unlike the sighted, blind subjects' images also failed to overflow an "image space" of fixed size. Finally, blind subjects were, with one exception, unable to mimic successfully the responses of a sighted person, when explicitly asked to do so. In the second experiment, subjects pointed to the left and right sides of three objects imaged at three distances. Sighted and blind groups both showed a decrease in pointing span with the size of the object, but only the sighted subjects showed a decrease with increased image distance, in accordance with the laws of perspective.
在两项实验中，对先天性失明受试者和视力正常受试者的成像进行了比较。在第一项实验中，受试者被要求估计图像中物体看起来有多远。结果显示，失明受试者将物体成像在“伸手可及范围内”，并且只有轻微的倾向将较大的物体成像得离自己更远。相比之下，有视力的受试者倾向于将较大的物体成像得好像离自己更远。此外，与有视力的人不同，失明受试者的图像也不会超出固定大小的“图像空间”。最后，除了一个例外，当被明确要求时，失明受试者无法成功模仿有视力的人的反应。在第二项实验中，受试者指向在三个距离成像的三个物体的左侧和右侧。有视力组和失明组都随着物体大小的增加而显示出指向跨度的减小，但只有有视力的受试者根据透视规律随着图像距离的增加而显示出指向跨度的减小。
