Several types of research, studies, and arguments suggest different intellectual and creative levels in left-handed and right-handed people. While people used to believe that left-handed people are more intellectual, with due time this theory has been proverb wrong. Though the right and left hemispheres of the brain respond differently for both handedness, there is no study to prove one is intellectually superior to the other.
Left Handed vs Right Handed
The difference between left-handed and right-handed people is that left-handed people use their left hand for doing most of the tasks like lifting, writing, eating, etc. Right-handed people have their right hand as the dominant hand and use it most of the time. For left-hand people, some daily activities might get difficult that are made in convenience with right-handed people like zipping, swiping cards, etc.
Left-handed people comprise only 10% of the total world’s population. Left-handed people tend to show less brain lateralization which means that both sides of their brain show fewer differences. Since the population of left-handed people is very very little, during middle age they were accused of being witches.
Right-handed people are dominant in terms of population as they comprise 90% of the total world’s population. Since right-handed are present in the majority, some certain activities or devices are designed according to them. For example, in a computer lab, the mouse is always present on the right-hand side.
|Parameters of Comparison||Left Handed||Right Handed|
|Meaning||In left-handed people, their left hand is more dominant and they find it difficult to perform tasks with their right hand.||In right-handed people, their right hand is more dominant and they find it difficult to perform tasks with their left hand.|
|Population||About 10% population of the world are left-handed.||Right-handed people comprise 90% of our world’s population.|
|Health Risks||Left-handed people are more prone to diseases like dyslexia and ADHD.||Right-handed people are not prone to any disease due to their handedness.|
|Difficulties||Some everyday tasks like putting on a zipper, swiping credit cards, using computer mouses become difficult for left-handed people.||Right-handed people do not face any difficulty using or operating any devices.|
|Brain Lateralization||Left-handed people show less brain lateralization.||Right-handed people show more brain lateralization.|
|Ultrasound||Some experts say that ultrasound has effects on causing left-handedness.||Unborn right-handed babies are not affected by ultrasound.|
|Genetics||Left-handed parents are more likely to have left-handed children.||Right-handed parents don’t have much influence on the handedness of their children.|
What is Left-Handed?
The left-handed people have suffered a lot during the Middle Ages as they were punished thinking they were evil and practicing witchcraft. Even during the 20th century, parents and teachers forced kids to switch from left to right hand as they thought it was some kind of disease or disorder. Today, 10% of the world’s population is left-handed, and with time the superstitions have vanished.
The difference between left-handed and right-handed people has caused many research and studies and every time a new conclusion arrives. Many people believed that left-handed people are more intellectual or their creative side is more dominant, but no experiment has proven it so far. Since many US presidents were left-handed, it got people thinking that they have better leadership qualities.
Several studies have concluded that left-handed people are more prone to diseases like dyslexia and ADHD. Many studies are still going on to understand the genetics behind left-handed people. There are more than one genetic factors that are responsible for causing left-handedness. But, even if a child is left-handed during birth, their upbringing or training to make them right-handed can change the dominant hand.
What is Right-Handed?
In right-handed people, the left side of the brain dominates as this side is responsible for controlling the right leg, hand, eye, etc. Many scientists perform studies to understand how ancestors became primarily right-handed even before the humans arrived. Evidence from 1.5 million years ago shows that Homohabilis and Home erectus showed right-handedness.
One of the most common theories for right-handedness is brain lateralization that was further caused by vocalization. Cerebral asymmetry for speech is a process of evolution. When people started to use sounds and words to communicate, their hands were relieved from making gestures and thus more available for work like hunting and tool making. A study by McManus (1999, 2002) suggests that left-handedness is a result of mutation.
Today, 90% of the world’s population is right-handed. Evolution has caused our brain to differentiate activities and allot a specific side of the brain for that. But, studies show that the right-handed preference for manual actions are developed in fetus within 15 weeks as they start sucking their right thumb.
Main Differences Between Left Handed and Right Handed
- In left-handed people, their left hand is more dominant and in right-handed people their right hand is dominant.
- About 10% population of the world are left-handed whereas the rest 90% population is right-handed.
- Left-handed people are more prone to diseases like dyslexia and ADHD where handedness doesn’t have that influence on right-handed people.
- Some everyday tasks like putting on a zipper, swiping credit cards, using computer mouse become difficult for left-handed people but not for right-handed people.
- Left-handed people show less brain lateralization whereas right-handed people show more brain lateralization.
- Some experts say that ultrasound has effects on causing left-handedness but it doesn’t have any effect on causing right-handedness.
- Left-handed parents are more likely to have left-handed children whereas right-handed parents don’t have much influence on the handedness of their children.
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