We investigated several sensory and cognitive determinants of colour constancy across 40 illumination hues. In the first experiment, we measured colour naming for the illumination and for the colour induced by the illumination on the colorimetric grey. Results confirmed that the induced colours are approximately complementary to the colour of the illumination. In the second experiment, we measured colour constancy using achromatic adjustments. Average colour constancy was perfect under the blue daylight illumination and decreased in colour directions away from the blue daylight illumination due to undershooting and a strong blue bias. Apart from this blue bias, colour constancy was not related to illumination discrimination and to chromatic detection measured previously with the same setup and stimuli. We also observed a strong negative relationship between the degree of colour constancy and the consensus of naming the illumination colour. Constancy coincided with a low naming consensus, in particular because bluish illumination colours were sometimes seen as achromatic. Blue bias and category consensus alone explained >68%, and all determinants together explained >94% of the variance of achromatic adjustments. These findings suggest that colour constancy is optimised for blue daylight.
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机译:识字和算术磁性图。白色磁性片,可轻松放置在白板上。各种类型的图表,包括大型写作图表,Andrewa的电磁数学表格和学生魔术写作图表。图表可以水平(600x900mm)或(250x200mm)或垂直(900mmx600mm)排列。写作图表用虚线表示。粗线为蓝色,虚线为红色。 Andrewa的Magnetic Math Grid由50x50mm的蓝色方块组成;网格为594x841mm,由十七行十一列组成。