According to the new study, the category of colours can be independent of language, at least in the early stage of development in an infant's visual system.

The researchers from Chuo University, Japan Women's University and Tohoku University tested 5-7 months old infants to see if brain activity is different for colours in different categories.

The study, published in the journal of Proceedings of the National Academy of Sciences, found that the brain activity increased significantly when the colours of blue and green were alternated, while there was no significant reaction to the alternation of different shades of green.

The difference was observed in both left and right hemispheres of the brain.

Since language related cortical areas reside in the left hemisphere in most right-handed adults, the observed brain activity had no direct relation to language processing.

In addition, brain activity caused by categorical colour differences was not found in the occipital region, which is known to play a significant role in the early stage of visual processing.


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