Psychologists revise the test every few years in order to maintain 100 as the average. Most people (about 68 percent) have an IQ between 85 and 115. Only a small fraction of people have a very low IQ (below 70) or a very high IQ (above 130). The average IQ in the United States is 98.

What is the average IQ of a 12 year old?

Price, a professor at the Wellcome Trust Centre for Neuroimaging at University College London, and colleagues, tested 33 "healthy and neurologically normal" adolescents aged 12 to 16. Their IQ scores ranged from 77 to 135, with an average score of 112.

What is the average IQ for a 17 year old?

The average score for 16-17-year-olds is 108, which denotes normal or average intelligence. For adults between 18 and 19 years of age, the average IQ score is 105, which also denotes normal or average intelligence.