Right-brained individuals are considered creative thinkers and have high levels of intuition, while left-brained individuals are expected to be more analytical, paying attention to details and the rules of logic. Even though different functions of the brain, over time, have been cited to be specific to either the left or the right hemisphere, there is little evidence showing that the functioning takes place in only one hemisphere (Riès, Dronkers, & Knight, 2016). With the help of a corpus callosum, the brain connects one hemisphere to another, ensuring significant data exchanges between the two. This means that neuron activation in any of the locations in one brain hemisphere will lead to activity in other regions, including the opposite hemisphere. While damaged or diseased brains can function differently, in well-functioning brains, the notion that one hemisphere works independently from the other, is considered false by researchers (Allen & van der Zwan, 2019).
There are no substantial empirical findings suggesting that people use either side of the brain more for thinking, which could lead to peculiar attitudes or tendencies. It is important to note that some people may be stronger in creative thinking, while others are more proficient in analytical thinking, and some can be strong across multiple domains. Although, there are no reasonable grounds to associate any traits, including the tendency to believe false information, with the dominance of one hemisphere over another (Nielsen, Zielinski, Ferguson, Lainhart, & Anderson, 2013). To conclude, there is no scientific evidence can be found to suggest that right-brainers are more likely to accept untrue information compared to those individuals in whom the left hemisphere dominates, which makes the suggestion a myth.
References
Allen, K-A., & van der Zwan, R. (2019). The myth of left- vs right-brain learning. International Journal of Innovation, Creativity and Change, 5(1), 189-200.
Nielsen, J. A., Zielinski, B. A., Ferguson, M. A., Lainhart, J. E., & Anderson, J. S. (2013). An evaluation of the left-brain vs. right-brain hypothesis with resting state functional connectivity magnetic resonance imaging. PloS One, 8(8), e71275.
Riès, S. K., Dronkers, N. F., & Knight, R. T. (2016). Choosing words: left hemisphere, right hemisphere, or both? Perspective on the lateralization of word retrieval. Annals of the New York Academy of Sciences, 1369(1), 111-131.