Kaneko Sae, Murakami Ikuya, Kuriki Ichiro, Peterzell David H
Research Institute of Electrical Communication, Tohoku University, Miyagi, Japan.
Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Miyagi, Japan.
Iperception. 2018 Sep 23;9(5):2041669518800507. doi: 10.1177/2041669518800507. eCollection 2018 Sep-Oct.
In classic simultaneous color contrast and simultaneous brightness contrast, the color or brightness of a stimulus appears to shift toward the complementary (opposite) color or brightness of its surrounding region. Kaneko and colleagues proposed that simultaneous contrast involves separate "fast" and "slow" mechanisms, with stronger induction effects for fast than slow. Support for the model came from a diverse series of experiments showing that induction by surrounds varying in luminance or color was stronger for brief than long presentation times (10-40 vs. 80-640 ms). Here, to further examine possible underlying processes, we reanalyzed 12 separate small data sets from these studies using correlational and factor analytic techniques. For each analysis, a principal component analysis of induction strength revealed two factors, with one Varimax-rotated factor accounting for brief and one for long durations. In simultaneous brightness experiments, separate factor pairs were obtained for luminance increments and decrements. Despite being based on small sample sizes, the two-factor consistency among 12 analyses would not be expected by chance. The results are consistent with separate fast and slow processes mediating simultaneous contrast for brief and long flashes.
在经典的同时色对比和同时明度对比中，刺激的颜色或明度似乎会朝着其周围区域的互补（相反）颜色或明度偏移。金子（Kaneko）及其同事提出，同时对比涉及独立的“快速”和“慢速”机制，快速机制的诱导效应比慢速机制更强。对该模型的支持来自一系列不同的实验，这些实验表明，对于亮度或颜色变化的周围环境，短暂呈现时间（10 - 40毫秒与80 - 640毫秒）的诱导作用比长时间呈现更强。在此，为了进一步研究可能的潜在过程，我们使用相关分析和因子分析技术重新分析了这些研究中的12个独立的小数据集。对于每次分析，对诱导强度进行主成分分析揭示了两个因子，其中一个经方差最大化旋转的因子解释短暂呈现，另一个解释长时间呈现。在同时明度实验中，对于亮度增加和减少分别获得了独立的因子对。尽管基于小样本量，但12次分析中两因子的一致性不太可能是偶然出现的。结果与分别由快速和慢速过程介导短暂和长时间闪光的同时对比一致。
