Eye- and feature-based modulation of onset rivalry caused by the preceding stimulus
Eye- and feature-based modulation of onset rivalry caused by the preceding stimulus
复制标题
基于眼睛和特征的先前刺激引起的起始竞争调节
作者：
Abe;S.;Kimura;E.;& Goryo;K
预先暴露于刺激可以调制初始知觉优势经历了短暂的测试刺激（发作竞争）的双眼竞争。本研究探讨了这种调制效果，使用颜色和图案刺激。我们证实了眼睛和功能为基础的superies的单独贡献，并表明其相对强度随时间参数而变化。基于眼睛的抑制更强，测试持续时间短（10 ms），前一个和测试刺激之间的ISI更短。另一方面，基于特征的抑制随着ISI的增加而增加，并且随着测试持续时间的延长（200 ms）而更加明显。我们还研究了调制效应的性质与基于特征的抑制使用高亮度对比度的彩色光栅。结果表明，不同的功能，前刺激（即，颜色和方向）施加几乎独立的影响，开始竞争。然而，不同的功能共享他们的命运在竞争的相互作用知觉优势;当一个功能成为主导，其他也占主导地位。这些研究结果表明，竞争性的相互作用的感知优势和调制这些相互作用介导的至少部分由不同的机制。总体而言，目前的研究结果是一致的理论观点，即最初的优势是通过竞争的相互作用，在多个层次的处理。
Pre-exposure to a stimulus can modulate initial perceptual dominance experienced in binocular rivalry with brief test stimuli (onset rivalry). This study investigated this modulating effect using both color and pattern stimuli. We confirmed separate contributions of eye-and feature-based suppressions and showed that their relative strength varied with temporal parameters. Eye-based suppression was stronger with a short test duration (10 ms) and shorter ISIs between the preceding and test stimuli. On the other hand, feature-based suppression grew with ISI and was more pronounced with a longer test duration (200 ms). We also investigated the nature of the modulating effect associated with feature-based suppression using chromatic gratings of high luminance contrast. Results revealed that different features of the preceding stimulus (ie, color and orientation) exerted nearly independent effects on onset rivalry. However, different features shared their fate in competitive interactions for perceptual dominance; when one feature became dominant, the other also dominated. These findings suggest that competitive interactions for perceptual dominance and the modulation of these interactions are mediated at least partially by different mechanisms. Overall, the present findings are consistent with a theoretical view that initial dominance is established through competitive interactions at multiple levels of processing.