What Is the Highest Score on an IQ Test?

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As of 2014, the highest score recorded was achieved by Abdesselam Jelloul, who scored a 198 in a 2012 test including 13 dimensions of intelligence. Four others have scored at 190 or above. The highest IQ test score theoretically possible is 200. Such a score is described as “unmeasurable genius” according to the IQ test guidelines, while scores below this peak are divided into seven descriptive categories.

A person with an IQ score over 140 is considered to have a “genius or almost genius” intelligence level. People with scores between 120 and 140 are described as possessing “very superior intelligence.” Scores in the 110 to 119 range are said to represent “superior intelligence.” “Average or normal intelligence” describes people with scores between 90 to 109. A score of 80 to 89 represents “dullness,” while a score of 70 to 79 represents a “borderline deficiency in intelligence.” Any score below 70 denotes “feeble-mindedness.”

While IQ, or intelligence quotient, tests purport to measure intelligence, they are quite controversial. Some people believe IQ tests are culturally biased and that they do not measure all forms of intelligence. Others wonder how much IQ scores predict real-life success as opposed to academic success. Several standard intelligence tests have been deemed inappropriate for autistic children.