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Wechsler and Deviation IQ

  • The Wechsler subscale and deviation IQ scores are used on the most popular IQ tests in the U.S. (WAIS and WISC)
  • The Wechsler Subscales have a mean of 10 and a standard deviation of 3
  • Subscale = 3z + 10

  • The Deviation IQ has a mean of 100 and a standard deviation of 15
  • Deviation IQ = 15z + 100