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Although men have larger brains, men and women have equal IQs. [19] For men, the gray matter volume in the frontal and parietal lobes correlates with IQ; for women, the gray matter volume in the frontal lobe and Broca's area (which is used in language processing) correlates with IQ. [20]
IQ Range ("deviation IQ") IQ Classification Percent Included 128 and over Very Superior 2.2 120–127 Superior 6.7 111–119 Bright Normal 16.1 91–110 Average 50.0 80–90 Dull normal 16.1 66–79 Borderline 6.7 65 and below Defective 2.2
The Wechsler Adult Intelligence Scale (WAIS) is an Intelligence Quotient (IQ) test designed to measure intelligence and cognitive ability in adults and older adolescents. [1] For children between the ages of 6 and 16, Wechsler Intelligence Scale for Children (WISC) is commonly used.
Norwegian epidemiologists used military records to examine the birth order, health status, and IQ scores of nearly 250,000 18- and 19-year-old men born between 1967 and 1976.
A man in France continues to puzzle scientists nearly a decade after he was found to be living with just 10 percent of a typical human brain. His case was originally published in The Lancet ...
The resulting fraction was multiplied by 100 to obtain the IQ score. [2] For modern IQ tests, the raw score is transformed to a normal distribution with mean 100 and standard deviation 15. [3] This results in approximately two-thirds of the population scoring between IQ 85 and IQ 115 and about 2 percent each above 130 and below 70. [4] [5]
In Florida, for example, which has about six million people 65 and older, Perls estimates that there could be about 10,000 centenarians (people living to age 100).
In Australia, the IQ of 6–12-year-olds (as measured by colored progressive matrices) has shown no increase from 1975 to 2003. [62] In the United Kingdom, a study by Flynn (2009) himself found that tests carried out in 1980 and again in 2008 show that the IQ score of an average 14-year-old dropped by more than two points over the period.