1 in 20 Koreans in gray intellectual zone: survey

A state-commissioned study showed that 5.1 percent of minors and 6.8 percent of adults in South Korea are at significant risk of having borderline intellectual functioning, referring to below-average cognitive ability not severe enough to be considered intellectual disability.

Of the participants under age 18, 2.6 percent were categorized as being in the BIF at-risk group, while 2.5 percent were categorized as being in the BIF search group, according to the survey on 9,000 Koreans under age 60 c ...