Definition: A numerical score on an intelligence test, originally computed by dividing the persons mental age by chronological age and multiplying it by 100. (Short for intelligence quotient).

Quite Simply...

  • A numerical measurement of how smart someone is, determined by a specified IQ test.
  • In mathematical terms...your Mental Age/Chronological age x 100


  • Einstein had an IQ thought to be around 160-180 making him mentally "gifted".
  • The average IQ is 100, meaning that your mental age and chronological age are the same.
  • People with IQ levels below 70 are considered to have an intellectual disability


Some IQ Test Insight:

See Also...

  • Mental Retardation: Anyone with an IQ 30 points below average (>70), occurs within less than 2% of the population
  • Giftedness: Anyone with an IQ 30 points above average (130+), occurs within less than 2% of the population
  • Mental Age: Average age at which normal individuals receive a particular score (combined with Chronological age to find IQ)
  • Chronological Age: Number of years since birth (combined with mental age to find IQ)
  • Analytical Intelligence (Sternberg): Intellectual ability measured by most IQ tests- AKA logical reasoning

Additional Resources

  2. Take an IQ test! --->