Hong Sang Wook, Shevell Steven K
Department of Psychology, University of Chicago, Chicago, IL 60637, USA.
Psychol Sci. 2009 Sep;20(9):1084-91. doi: 10.1111/j.1467-9280.2009.02408.x. Epub 2009 Jul 23.
How does a physical stimulus determine a conscious percept? Binocular rivalry provides useful insights into this question because constant physical stimulation during rivalry causes different visual experiences. For example, presentation of vertical stripes to one eye and horizontal stripes to the other eye results in a percept that alternates between horizontal and vertical stripes. Presentation of a different color to each eye (color rivalry) produces alternating percepts of the two colors or, in some cases, a color mixture. The experiments reported here reveal a novel and instructive resolution of rivalry for stimuli that differ in both form and color: perceptual alternation between the rivalrous forms (e.g., horizontal or vertical stripes), with both eyes' colors seen simultaneously in separate parts of the currently perceived form. Thus, the colors presented to the two eyes (a) maintain their distinct neural representations despite resolution of form rivalry and (b) can bind separately to distinct parts of the perceived form.
物理刺激是如何决定有意识的感知的？双眼竞争为这个问题提供了有用的见解，因为竞争期间持续的物理刺激会导致不同的视觉体验。例如，向一只眼睛呈现垂直条纹，向另一只眼睛呈现水平条纹，会产生在水平条纹和垂直条纹之间交替的感知。向每只眼睛呈现不同颜色（颜色竞争）会产生两种颜色的交替感知，或者在某些情况下产生颜色混合。此处报道的实验揭示了一种针对形式和颜色均不同的刺激的新颖且具有启发性的竞争解决方案：在竞争形式（例如水平或垂直条纹）之间进行感知交替，同时在当前感知形式的不同部分同时看到两只眼睛的颜色。因此，呈现给两只眼睛的颜色（a）尽管形式竞争得到解决，但仍保持其独特的神经表征，并且（b）可以分别与感知形式的不同部分结合。
