Are right‑brained people really more creative?

The idea that people are either left-brained or right-brained, with their personality and abilities determined by which side of the brain is dominant, is a popular notion but not supported by scientific evidence. This concept dates back to the 1860s when French doctor Paul Broca discovered that speech is mainly controlled by the left side of the brain.

A century later, Nobel laureate Roger Sperry's research on brain surgery patients further solidified the notion of lateralization, finding that the left side is specialized for language while the right side handles emotional and nonverbal processing. However, this division is not unique to humans; it is a trait found in other animals as well.

The notion that we are either left-brained or right-brained likely stems from the Barnum effect, where people accept personality traits attributed to them once they are labeled, regardless of their accuracy. Despite individual differences in lateralization, research has found no consistent patterns linking brain activity to personality traits or skills.

Creativity, for instance, involves widespread brain networks across both hemispheres rather than being confined to the right side. Thus, while each hemisphere performs distinct functions, the idea of being fundamentally left-brained or right-brained is an oversimplification that does not accurately reflect the complex interplay between brain regions and human abilities.