The high range IQ test was developed experimentally to measure IQ in the very high range. The official IQ tests, such as the Wechsler and Stanford-Binet, limit the measurement range of adult IQ to approximately IQ 160. (SD15). However, human intelligence can be calculated statistically theoretically up to roughly IQ 195 (SD15) or higher. High range IQ tests have been developed as a result of this statistical reason. The high range IQ test is divided into three categories: verbal, numerical, and spatial. According to the high range IQ test, an individual may have high intelligence in one or more categories.
The standardization method of these tests is where these tests can be evaluated as having a strong experimental tendency. When these tests are standardized, obtaining sufficient data is difficult because the statistical range of the measurement range is extremely rare. Scores based on the preliminary norm are also subject to such skepticism. Even so, it is difficult to argue that the reliability and validity of high range IQ tests are not guaranteed, given that people who perform well on these tests also perform well on the official IQ tests.
Based on these high range IQ tests, GIGA Society assesses humans’ extremely high intelligence up to IQ 190 (SD15). One of the GIGA Society’s missions is to find excellent high range IQ tests. This mission is currently overseen by a council of three members.