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The question whether to believe in the difference between right-brained and left-brained people should only be answered by neuroscience. But what does right-brain versus left-brain actually refer to?

Human anatomy tells us that the brain is split up in two parts, called hemispheres, which are connected by another part, corpum callosum. This part allows the two hemispheres to communicate with each other. When the communication channel was cut, then scientists were able to observe how different cognitive processes arose from which hemisphere. In their research, it was firstly noted that language was localized in the left hemisphere; more specifically, this means that the vocabulary and grammar (which build up the language function), when employed, determine the left hemisphere of the brain to become more active than the right hemisphere.

From this starting point, the idea that the left hemisphere is the part of the brain where logical and analytical processes take place, whereas the right hemisphere is responsible with creative processes led to the right-brain / left-brain theory. This theory also suggests that some people engage more their left hemisphere in their everyday life, while others tend to use more their right hemisphere, which also causes the differences in personality traits.

How should one know whether such a theory is true or not? Clearly, the answer relies on scientific evidence. Recent studies are against this theory; one popularly cited article reveals that people use both of their hemispheres, on average and no clear-cut distinction was made regarding which activity requires which hemisphere. However, one of the first findings in this field is not being denied - the language function has its area of activity in the left brain, but nothing more should be inferred from this.

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[ 2 ].  Michael Gazzaniga and Roger Wolcott Sperry.

[ 3 ]. Dehaene, S., Molko, N., Cohen, L., & Wilson, A. J. (2004)....