Lefties historically have had a tendency to get left behind.
Lately, being left-handed was stigmatized, sometimes as an abnormality or sign of weakness. Left-handed children were forced to learn to write with their right hands, often to their significant disadvantage.
Obviously, we all now know that there’s nothing wrong with being left-handed. As University of Toledo psychologist Stephen Christman recently explained in Scientific American: there’s almost no evidence to suggest that lefties are at any sort of physical or psychological disadvantage.
For certain, lefties have involved approximately 10 percent to 15 percent of the general population for many thousands of years. The fact that the attribute has remained stable over many generations proves that left-handedness is not an evolutionary weakness, as many psychologists of the past believed.
However, handedness does come with certain physiological and neurological differences. Research remains incomplete, but this things we know about the unique cognitive and psychological profiles of the left-handed:
1.They may be quicker thinkers
Lefties might have the capacity to use both sides of their brain more effortlessly and efficiently.
According to an Australian study published in 2006 in the journal Neuropsychology, left-handed people tend to have faster connections between the right and left hemispheres of the brain, which leads to quicker information processing. The study authors measured participants’ execution on an assignment that surveyed exchange time between brain hemispheres, and one that required them to use both sides of their brain at the same time.
The research revealed that left-handed participants were faster at processing information across the two sides of the brain. That could be their advantage that could benefit them in things like video games and sports.
2.They may be left-favoring in decision-making processes
A 2009 Stanford University study found that left-handed and right-handed individuals may engage in an implicit favoring of their dominant side. In the study, participants were shown two columns of illustrations and were asked to judge which seemed more happy, honest, intelligent and attractive. Left-handed implicitly chose illustrations in the left column, and right- handed tended to choose images on the right side.
“For left-handed people, implicitly, they think good stuff is on the left and bad stuff is on the right, despite the fact that intentionally, explicitly, everything in language and culture is telling them the exact opposite,” the study’s lead author, psychologist Daniel Casasanto, said in a statement.
3. Lefties have the upper hand in some sports
While less than 15 percent of the general population is left-handed, 25 percent of Major League baseball players are lefties. And why is that? It might be because they tend to have faster reaction times, as the 2006 Australian study cited above found.
There’s is also another reason. Studies have found that lefties seem to have a genuine advantage in interactive sports, such as boxing, fencing, tennis and baseball. However, this advantage doesn’t extend to non-interactive sports, like gymnastics and diving. It’s possible that because of their different physical orientation and movements, lefties are able throw off right-handed opponents, who are used to going up against other right-handed.
4. Their brains may organize emotion differently
Your dominant hand may decide how emotions are arranged in your brain. A 2012 study published in the journal PLoS ONE found that in left-handed, inspiration was connected with greater activity in the right hemisphere of the brain, while the opposite was valid for right-handed.
This may have important implications in caring for anxiety and mood disorders, which are sometimes treated using brain stimulation to increase neural activity in the left hemisphere.
“Given what we show here, this treatment, which helps right-handed, may be detrimental to left-handed ― just the opposite of what they need,” says one of the study’s authors, psychologist Geoffrey Brookshire.
5. Lefties may be more creative thinkers
Many experts and studies says there is a link between left-handedness and creativity. Is it true? Very possible. Some research has found that lefties are better at divergent thinking (the capacity to think of many solutions to a single problem), a cognitive hallmark of creativity. But, it’s important to note that studies demonstrate correlation, not causality, so the findings aren’t entirely conclusive.
Another possibility, proposed by University College London psychologist Chris McManus in his book Right-Hand, Left-Hand, is that the brains of lefties have a more highly developed right hemisphere, which has been suggested to be more involved in creative thinking.
There’s one extra potential link between left-handedness and creativity. One that’s speculative but still intriguing. Growing up in the left-handed minority and seeing themselves as different from their peers, some children may come to develop what’s known as an “outsider’s mindset,” or a tendency to have a self-image that’s more individualized rather than group-oriented.
Such a mindset can incline a person to develop qualities like independence and non-conformity, which psychologists have linked to creative thinking and innovation.