A new research has suggested that left-handed people often perform better than right-handers at extremely fast or difficult tasks that involve lots of information or stimuli. Dr. Nick Cherbuin from the Australian National University and his colleagues have reported their findings in the November issue of the journal called Neuropsychology.
Their research has shown that the left and right hemispheres communicate and work together better in left-handers, because information seems to be transferred from one to the other slightly faster and perhaps more efficiently.
Well how does this happen? Dr. Nick explained that the left-hander’s brain is wired slightly different to the right-hander, because it tends to be more symmetrical with larger and perhaps faster connections between the hemispheres.
The research found that those people, who had faster connections between the hemispheres, were much more efficient at performing tasks that require processing in two hemispheres.
Examples that require such coordination between the hemispheres include those tasks which require interpretation of a lot of information such as talking while driving in heavy traffic, piloting a jet fighter or in even playing fast computer games.
“As our brain ages we lose processing resources in the two hemispheres but left-handers may be able to cope better because the sharing of resource across their hemispheres is more efficient,” the study quotes.
The computer tests that were conducted in 80 right and 20 left-handers measured how fast information was transferred between hemispheres by hitting a button to indicate whether a light flash was left or right of a dot.
Another test to match letters, found that left-handers performed much better when letters flashed on both sides of the dot, and this task actually requires collaboration across hemispheres.
Right-handers did better when letters were on the same side of the dot. Thus they were termed as more efficient at single hemisphere processing.
In fact, it is interesting to note that 7 to 10% of people who are left-handed adjust to our right-handed world by using their right hand more. Dr. Nick Cherbuin who is a right-hander confirmed the above statement.