The idea that people are "left-brained" or "right-brained" infiltrated esotericism from pop psychology, which to this day asserts that "left-brained" individuals are more analytical while "right-brained" individuals are more creative. Even when I was in college twenty years ago professors were working hard to debunk this notion, but for whatever reason it remained stuck in the popular imagination. Back then, it was known that in Americans language tended to be processed on the left while spatial information tended to be processed on the right - though it should be noted that children who grew up learning Asian languages were much more likely to have language represented on both sides of the brain.
This functional division severely undermines the "creative" designator for the right hemisphere, as it should be obvious that while the creativity of a painter would tend to employ the spatial processing of the right hemisphere, that of a writer would tend to employ the language processing of the left hemisphere. This was the main avenue of attack back in the early 1990's. Since then, brain scanning and related technologies have improved dramatically, giving us the ability to map localized neural functions in real time. Researchers recently ran a study using this technology and found what looks like definitive evidence that the "left-brain/right-brain" dichotomy is essentially meaningless.
This functional division severely undermines the "creative" designator for the right hemisphere, as it should be obvious that while the creativity of a painter would tend to employ the spatial processing of the right hemisphere, that of a writer would tend to employ the language processing of the left hemisphere. This was the main avenue of attack back in the early 1990's. Since then, brain scanning and related technologies have improved dramatically, giving us the ability to map localized neural functions in real time. Researchers recently ran a study using this technology and found what looks like definitive evidence that the "left-brain/right-brain" dichotomy is essentially meaningless.
"It's absolutely true that some brain functions occur in one or the other side of the brain. Language tends to be on the left, attention more on the right. But people don’t tend to have a stronger left- or right-sided brain network. It seems to be determined more connection by connection," study researcher Jeff Anderson, M.D., Ph.D., said in a statement.