IQ tests are widely used to measure intelligence, the best known of which are the Wechsler Adult Intelligence Scale (WAIS), the Wechsler Intelligence Scale for Children (WISC), the Stanford-Binet Intelligence Test and the Progressive Matrices of Intelligence. Raven.
The maximum score on a commonly accepted IQ test is 160, with extrapolations up to 164 points. When calculated with a standard deviation (SD) of 24, this score can theoretically reach up to 200 points. However, this does not mean a different level of intelligence, just a different statistical interpretation of the same results. In Brazil, there are no IQ tests that recognize scores above 160 points.
Tests that indicate very high scores may not be scientifically proven and therefore lack validity. High IQ societies such as Mensa, Intertel, Triple Nine Society and ISPE only recognize validated and proven tests on their websites. It is recommended to check with these societies to validate claims of extraordinary scores. Scores above 200 points are probably unreliable and the tests may not be valid.
References:
• Abdel-Khalek, A. (2005). Reliability and Factorial Validity of the Standard Progressive Matrices among Kuwaiti Children Ages 8 to 15 Years. Perceptual and Motor Skills, 101, 409-412.
• Chepure, A., Jog, P., Ungratwar, A., Subramanyam, A., & Kamath, R. (2023). Comparison of intelligence in children with autism and controls: Raven’s progressive matrices and Wechsler intelligence scale-III. Annals of Indian Psychiatry, 7, 130-139.
• O’Leary, U., Rusch, K. M., & Guastello, S. (1991). Estimating age-stratified WAIS-R IQS from scores on the Raven’s Standard Progressive Matrices. Journal of clinical psychology, 47(2), 277-284.
• Whorton, J., & Karnes, F. (1987). Correlation of Stanford-Binet Intelligence Scale Scores with Various other Measures Used to Screen and Identify Intellectually Gifted Students. Perceptual and Motor Skills, 64, 461-462.
