IQ Scores and IQ Levels
IQ Score is an individual assessment of a person's intelligence and cognitive abilities relative to an average person of the same age. In other words, IQ Score is the ratio of a person's mental age to his or her biological age. Mathematicians and Nobel laureates have the highest IQ Score values.
The Wechsler Adult Intelligence Scale (WAIS), developed by the renowned American psychologist and psychiatrist David Wechsler, is most commonly used to classify IQ levels
| IQ Range ("deviation IQ") | IQ Classification |
|---|---|
| 130 and above | Very Superior |
| 120–129 | Superior |
| 110–119 | High Average |
| 90–109 | Average |
| 80–89 | Low Average |
| 70–79 | Borderline |
| 69 and bellow | Extremely Low |
The average IQ is 100 points with a standard deviation of 15 points in both directions. Thus, if we examine a large number of people, about 50% of them will get values in the range of 90 to 110. The rest of the test takers will score below 90 and above 110.
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