Most of us have heard the claim that people are either right-brain or left-brain dominant. The internet is full of claims that your personality is shaped by your brain type. The purpose of this post is to investigate common internet claims and assumptions like those found in this online article and survey. As well as the scientific analysis of this claim being discussed in the article, “The Truth About The Left Brain / Right Brain Relationship” published on npr.org.
Many so called experts claim that by identifying the differences in brain dominance, we can become more aware of how our brain dominance affects the way we learn. This suggests that we can alter our study methods and shape our lives to suit our brain dominance.
The claim states that left-brain dominate people tend to be more analytical, sequential, logical, and cautious. Whereas, those that are right-brain dominate tend to be more emotional, intuitive, spontaneous, and artistic. Some “experts” also suggest that left handed individuals are more likely to be right-brained; however, I can testify my left-handed daughter is a list maker like me.
If it were true that hemispheric dominance impacted our personalities, we certainly should be interested in knowing which side of our brain is controlling our personality. This knowledge would empower us to make choices that would better suit our natural preferences. However, this claim falls under the category of pseudoscience. For those of you who are unfamiliar with the term, it is defined as something that pretends to be science but without any real scientific approach to proving its authenticity.
The truth is, we’re just not that simple. True Neuroscientists know this claim does not hold water. In fact a new term has been coined to reference the way society has begun to oversimplify the scientific advances and discoveries being made in neuroscience today… folk-science.
The truth is folk-science is challenging genuine neuroscience discoveries because in general, genuine neuroscience developments are too complex for most people to apply to every-day life and understanding. By oversimplifying the discoveries of neuroscience, people can make personal connections to the material and apply it to their every day lives.
True neuroscience developments have found that particular sections of the brain can influence certain abilities and functions. Brain surgeons have been testing areas of the brain by temporarily freezing the identified areas to make sure they would be safe to remove. It is also true that particular areas of the brain contribute to functions both involuntary, like breathing and blood pressure, and voluntary like some motor functions.
What may have contributed to the claim that “left hemispheric dominance” suggests a more rational personality, and preference for organization and order, could be data obtained from brain imaging studies that show language and tool use, both functions that require organized and analytical approaches, are primarily lateralized to the left hemisphere.
There was also some evidence that the voice variations that accompany different emotional content or intentions are classically attributed to the right hemisphere. Classical attributions like this could have contributed to claims that people with right hemispheric preferences are more in tune with their feelings and the feelings of others. However even when a function is referenced as “lateralized to a particular hemisphere” they are rarely if ever solely credited with any function or conceptual understanding entirely.
Our brains are incredibly complex, scientists continue to make incredible discoveries and observations that illustrate the absurd nature of the oversimplified claim that a person’s personality is influenced by a preference of brain hemisphere. We could not possibly prefer one side of our brain over the other, and the functions controlled within our brain go far beyond personality.
If personalities fell within these two easily identifiable and one dimensional classifications, people would be far less complex. Raising children, educating youth, and our roles in society would be structured specifically around these two personality types. With today’s technology we’d be able to identify “right-brain” and “left-brain” thinkers early on and structure their learning and role in society specifically to their strengths.
It’s true people develop preferences, and we can find commonality among certain characteristics of our personality, but we should not be classified by one particular preference. We are not solely list makers, organizers, artists, or carefree individuals. We identify ourselves with a wide range of interests, experiences, strengths, weaknesses, and relationships. Our personalities are developed over time by an accumulation of experiences and relationships, and no two personalities are developed or effected in the exact same way by any one influence.
As for our brains, they certainly do have an impact on our personalities but not in the oversimplified manner projected by this claim. Our brains and their incredibly complex nature are only beginning to share their secrets through developing technology and neuroscience.
For those that identify with the advice outlined by this very popular claim, I recommend keeping a realistic point-of-view and understanding that your preferences do not make you a type. I recommend that you do not pigeon hole yourself as a “type”. Furthermore, understand that “types” are more static than “preferences,” we can alter our preferences and learn to appreciate things in spite of them. Whereas, “types” constrain us and imply that we are something, beyond our control; instead, understand that if you are list maker, you can also learn to appreciate being spontaneous when the time is right. If you fancy yourself a care-free spirit who lives on the edge of life but are always finding yourself late or forgetful, do not fret you can learn to keep a schedule when it matters.
While it may at times seem tempting to oversimplify yourself to seek the easy answers to challenges in your life, embrace the complex nature of your being and find solace in the truth that you are not confined by a single functioning hemisphere within your brain, instead you are only limited by your own desire to develop the skills you lack.