Medically reviewed by Deborah Weatherspoon, Ph.D., R.N., CRNA — created by Julie clues on in march 11, 2021

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The concept that lefties space smarter than righties has been floating approximately for some time.

You are watching: Is it true left handed people are smarter

While some studies have argued there may be a link between left-handedness and a greater IQ, rather have presented that right-handed civilization may actually have actually the edge.

Here’s what the research study says once it involves lefties and IQ.


Left-handed people, also known together “lefties” and “southpaws,” do up about 10 percent that the population.

Historically, left-handed civilization have to be viewed and also treated together outcasts. In the center Ages, left-handed people feared being accused of witchcraft.

As newly as the early on 20th century, many educators in the joined States required left-handers come “retrain” their herbal tendencies in bespeak to come to be right-handed.

Scientists also used come think the left-handedness was as result of minor mind damage in at an early stage development.

These myths have been debunked end the years, and also some have actually asserted that being left-handed is actually linked with greater intelligence.

While the case is intriguing, medical literature reveals there is no conclusion results.


What go the research study say?

The belief that handedness is associated with intelligence has actually been approximately for centuries.

Research appears to support both political parties of the argument. Here’s what research studies have shown in donate and versus the idea the left-handedness has actually anything to carry out with intelligence.

Are right-handed human being smarter?

A 2010 examine in the journal of the global Neuropsychological society revealed that strong right-handers seemed to execute slightly much better on cognitive exam when contrasted to left-handers.

A 2015 examine in Neuroscience & Biobehavioral evaluate looked at 5 meta-analyses that included data on much more than 16,000 individuals. They discovered no difference in IQ levels among left- and also right-handed people, however left-handers showed up to be more likely to have an intellectual disability.

However, this study shown that civilization who were intellectually gifted or complying with typical breakthrough were additionally just as likely to it is in left-handed.

A examine in Neuroscience and also Biobehavioral reviews looked in ~ 18 researches measuring the full IQ scores of more than 20,000 participants.

Although data argued that right-handed civilization had slightly greater IQ scores contrasted to left-handers, the scientists listed that knowledge differences in between right and also left-handed civilization were negligible overall.

Are left-handed people smarter?

Other researches have uncovered lefties seem to have the upper hand as soon as it involves smarts.

A 2007 examine in the journal of the Indian Academy of used Psychology found that, the end of 150 subjects, left-handed participants were significantly an ext likely to perform far better on an knowledge test 보다 right-handed people. Right-handers additionally took an ext time to complete the test.

Another examine in the journal brain in 2019 revealed that there are hereditary differences between left-handers and also right-handers.

Examining data on around 400,000 people, scientists discovered that the left and also right hemispheres that the brain were better connected and much more coordinated in regions involving language in left-handed people.

These traits suggest that left-handed people may have actually superior verbal skills.


Handedness, or hand preference, is the tendency to be more comfortable and also skilled once using one hand over the various other to carry out tasks.

While right-handedness and also left-handedness are well-known, there are also some less usual variations, including:

Mixed-handedness: favor various hands relying on the taskAmbidextrousness: can perform jobs equally through either hand

Influences on handedness

Scientists think your hand preference is a facility characteristic that’s affected by plenty of factors, including:

geneticsenvironmentrandom chance

Hand choice develops before birth and also becomes an ext obvious throughout early childhood and throughout one’s life.

Researchers think hand choice may need to do through the developmental differences between the right and left hemispheres that the brain. The best hemisphere controls activity on the left side of the body, if the left hemisphere controls movement on the ideal side of the body.

Recent researches have also suggested the multiple genes, maybe also close to 40, are concerned hand preference.

Children the left-handed parents are an ext likely to be left-handed than youngsters of right-handed parents. But because lefties room comparatively rare, most youngsters of left-handed parents are right-handed.

Cultural influences, environment, and also prenatal exposures may also play a function in determining handedness.


Intelligence deserve to be identified in numerous different ways.

In psychology, because that instance, knowledge may be described as own one or a mix of the following attributes:

a greater ability level, such as abstract reasoning, problem-solving, or decision-makingability to learnemotional knowledgecreativityadaptation

There are various theories of intelligence and ways to measure up it, consisting of the renowned intelligence quotient (IQ) tests.

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While certain exams can carry out useful information, they aren’t the only way to assess knowledge or validate this complicated label.