A FRESH LOOK AT THE TEMPORAL DYNAMICS OF BINOCULAR-RIVALRY
A FRESH LOOK AT THE TEMPORAL DYNAMICS OF BINOCULAR-RIVALRY
复制标题
DOI：
10.1007/bf00198769
复制
发表时间：
1989-01-01
影响因子：
1.9
通讯作者：
BLAKE, R
中科院分区：
文献类型：
--
作者：
MUELLER, TJ;BLAKE, R
人类观察员看到了双视正交正弦波光栅，并指出当排他性的可见性发生在任何一只眼睛。对比度在一只眼睛中保持恒定，而在另一只眼睛中增加或减少，持续多个交替周期（连续呈现）或仅持续一个独占可见期（同步呈现）。同步呈现条件使我们能够识别出在抑制期和主导期对比度的不同影响。混合相被记录为不同于抑制相和主导相，并定义了化合物主导相和化合物抑制相的新分类。结果表明，双眼竞争反应的刺激对比度在两个方面。1)主导和抑制的占空比由两只眼睛之间的相对图像对比度确定，其中更高对比度图像的主导是有利的，以及2）在抑制阶段期间，总交替速率由单眼图像对比度驱动（增加单眼对比度增加交替率），并在较小程度上通过单眼对比度在主导阶段（增加单眼对比度降低速率）。一个模型的开发，以反映这些想法。这些结果支持一个相互抑制振荡器作为双眼竞争的潜在机制。
Human observers viewed dichoptic orthogonal sine-wave gratings and indicated when exclusive visibility occurred in either eye. Contrast was held constant in one eye and was increased or decreased in the other eye for a number of alternation cycles (continuous presentation) or for only the duration of a single period of exclusive visibility (synchronous presentation). The synchronous presentation condition allowed us to identify the differing effects of contrast during the suppressed and during the dominant periods. Mixed phases were recorded as distinct from suppressed and dominant phases, and new classifications of compound-dominant and compound-suppressed phases are defined. The results indicate that binocular rivalry responds to stimulus contrast in two ways. 1) The duty-cycle of dominance and suppression is determined by the relative image contrast between the two eyes, with dominance of the higher contrast image being favored, and 2) the overall rate of alternation is driven by monocular image contrast during the suppressed phase (increased monocular contrast increases the alternation rate) and to a lesser extent by monocular contrast during the dominant phase (increased monocular contrast decreases the rate). A model is developed to reflect these ideas. These results support a reciprocal inhibition oscillator as the underlying mechanism of binocular rivalry.