Lateralization of categorical perception of color changes with color term acquisition

被引:97
作者
Franklin, A. [1 ]
Drivonikou, G. V. [1 ]
Clifford, A. [1 ,3 ]
Kay, P. [2 ]
Regier, T. [4 ]
Davies, I. R. L. [1 ]
机构
[1] Univ Surrey, Dept Psychol, Guildford GU2 5XH, Surrey, England
[2] Int Comp Sci Inst, Berkeley, CA 94704 USA
[3] Univ Calif Berkeley, Dept Linguist, Berkeley, CA 94720 USA
[4] Univ Chicago, Dept Psychol, Chicago, IL 60637 USA
基金
美国国家科学基金会;
关键词
visual field; color perception;
D O I
10.1073/pnas.0809952105
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Categorical perception (CP) of color is the faster and more accurate discrimination of two colors from different categories than two colors from the same category, even when same-and different-category chromatic separations are equated. In adults, color CP is lateralized to the left hemisphere (LH), whereas in infants, it is lateralized to the right hemisphere (RH). There is evidence that the LH bias in color CP in adults is due to the influence of color terms in the LH. Here we show that the RH to LH switch in color CP occurs when the words that distinguish the relevant category boundary are learned. A colored target was shown in either the left- or right-visual field on either the same- or different-category background, with equal hue separation for both conditions. The time to initiate an eye movement toward the target from central fixation at target onset was recorded. Color naming and comprehension was assessed. Toddlers were faster at detecting targets on different-than same-category backgrounds and the extent of CP did not vary with level of color term knowledge. However, for toddlers who knew the relevant color terms, the category effect was found only for targets in the RVF (LH), whereas for toddlers learning the color terms, the category effect was found only for targets in the LVF (RH). The findings suggest that lateralization of color CP changes with color term acquisition, and provide evidence for the influence of language on the functional organization of the brain.
引用
收藏
页码:18221 / 18225
页数:5
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