第二篇：       The notion that lefties are smarter than righties has been around for some time. Historically, left-handedpeople have been viewed and treated as outcasts. In the Middle Ages, left-handed people feared being accusedof witchcraft. As recently as the early 20th century, many educators in the United States forced left-handers to“retrain” their natural tendencies in order to become right-handed. Scientists also used to think that left-handednesswas due to minor brain damage in early development. These myths have been discredited over the years, and somehave asserted that being left-handed is actually associated with higher intelligence. While the claim is intriguing,medical literature reveals inconclusive results.       The belief that handedness is associated with intelligence has been around for centuries. Research seems tosupport both sides of the argument. A 2010 study revealed that strong right-handers seemed to perform slightlybetter on cognitive tests when compared to left-handers. A 2015 study looked at five meta-analyses that includeddata on more than 16,000 individuals. They found no difference in IQ levels among left- and right-handed people,but left-handers appeared to be more likely to have an intellectual disability. However, this study indicated thatpeople who were intellectually gifted or following typical development were also just as likely to be left-handed.Another paper looked at 18 studies measuring the full IQ scores of more than 20,000 participants. Although datasuggested that right-handed people had slightly higher IQ scores compared to left-handers, the scientists noted thatintelligence differences between right and left-handed people were negligible overall.       Other studies have found lefties seem to have the upper hand when it comes to intelligence. A 2007study found that, out of 150 subjects, left-handed participants were significantly more likely to perform better onan intelligence test than right-handed people. Right-handers also took more time to complete the test.Another study in 2019 revealed that there are genetic differences between left-handers and right-handers.Examining data on about 400,000 people, scientists discovered that the left and right hemispheres of the brain werebetter connected and more coordinated in regions involving language in left-handed people.
【題組】46. What is the best title for the passage?
(A) Are left-handers smarter than right-handers?
(B) The relationship between handedness and genes
(C) What studies say about handedness and verbal skills
(D) Are left-handed people discriminated against?