IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An I.Q between 90 and 110 is considered average; over 120, superior.
Roughly 68% of the population has an IQ between 85 and 115. The average range between 70 and 130, and represents about 95% of the population. A score below 70 may indicate problems in understanding the iQ questions or soem type or retardation, and a score above 130 may indicate intellectual giftedness.
1% of the population has an IQ of 136 or higher. However, an individual scoring 100 within one population can score above or below that value within another population, for example, the Japanese are supposed to have the highest average IQ in the world (115), but this 115 can only be an average of 100 within their own population.
| Intelligence Interval | Cognitive Designation |
| 40 - 54 | Severely challenged (Less than 1% of test takers) |
| 55 - 69 | Challenged (2.3% of test takers) |
| 70 - 84 | Below average |
| 85 - 114 | Average (68% of test takers) |
| 115 - 129 | Above average |
| 130 - 144 | Gifted (2.3% of test takers) |
| 145 - 159 | Genius (Less than 1% of test takers) |
| 160 - 175 | Extraordinary genius |
Japanese are supposed to have the highest average IQ in the world (115).
It all started with the Binet scale with one single goal in mind, to serve as a guide to identify children in the school who need special education to minimize their inferior level. Binet also reported that it’s not designed to measure ‘intelligence’. Later after many modifications on the original method of Binet such as Simon-Binet, or Stanford-Binet, Intelligence tests were getting more popular among the population as well as in government departments. In 1989 the American Academy for the Advancement of Science listed the IQ test among the twenty most significant scientific discoveries of the twentieth century along with nuclear fission, DNA, and flight.
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