Lateralization of categorical perception of color changes with color term acquisition

Franklin, A, Drivonikou, G V, Clifford, A, Kay, P, Regier, T and Davies, I R L (2008) Lateralization of categorical perception of color changes with color term acquisition. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 105 (47). pp. 18221-18225. ISSN 1091-6490

Full text not available from this repository.

Abstract

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.

Item Type: Article
Schools and Departments: School of Psychology > Psychology
Depositing User: Anna Franklin
Date Deposited: 06 Feb 2012 15:48
Last Modified: 26 Jun 2013 10:57
URI: http://sro.sussex.ac.uk/id/eprint/14510
📧 Request an update