Mental image generation and the contrast sensitivity function
Mental image generation and the contrast sensitivity function
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DOI：
10.1016/s0010-0277(02)00075-6
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发表时间：
2002-08-01
期刊：
影响因子：
3.4
通讯作者：
D'Angiulli, A
中科院分区：
文献类型：
--
作者：
D'Angiulli, A
在一个实验中，观察者被要求在光适应或暗适应的观察条件下产生小的和大的视觉心理图像，并对每个图像的生动性进行评级。在光适应观看中，小图像比大图像生成得更快。然而，在暗适应观察中，结果的模式是相反的。此外，暗适应图像比光适应图像更生动。结果表明，心理图像可以映射到对比敏感度函数（CSF）的某些区域，因此可以预测特定图像的延迟（和生动性）。由于CSF反映的视觉过程主要发生在V1，结果同意功能磁共振成像数据表明，早期视觉通路参与成像。尽管如此，图像和感知可能涉及由相同神经结构托管的不同过程，如图像延迟和对比敏感度之间的直接关系所示。(C)2002 Elsevier Science B.V.保留所有权利。
In one experiment, observers were instructed to generate small and large visual mental images in a light-adapted or a dark-adapted viewing condition, and to rate the vividness of each image. In light-adapted viewing, small images were generated faster than large images. However, the pattern of results was reversed in dark-adapted viewing. Furthermore, the dark-adapted images were more vivid than the light-adapted images. The results show that mental images can be mapped onto some regions of the contrast sensitivity function (CSF), so that the latency (and vividness) of a particular image can be predicted. Since the CSF reflects visual processes occurring mainly in V1, the results agree with functional magnetic resonance imaging data in indicating that early visual pathways participate in imagery. Nonetheless, imagery and perception may involve different processes hosted by the same neural structures as indicated by the direct relationship between image latency and contrast sensitivity. (C) 2002 Elsevier Science B.V. All rights reserved.