Q:

How is IQ calculated?

A:

Quick Answer

IQ is calcuated using test results that are compiled and then compared with the results from other people in the same age group to determine the test taker's intelligence quotient. The first step in measuring a person's IQ is to administer a specially designed test.

Continue Reading
How is IQ calculated?
Credit: Emma Kim Cultura Getty Images

Full Answer

Although the process has changed slightly, the underlying basis of the procedure used to determine IQ is first administering a test to determine a person's mental age or how much they know compared to others their same age. The mental age is then divided by that same person's chronological age and then multiplied by 100 to determine IQ.

IQ is not a measure of how well someone performs on a test. It is a number that represents the differences in intelligence levels across a large group of people.

Learn more about Measurements

Related Questions

  • Q:

    Is an IQ of 129 good?

    A:

    An intelligence quotient, or IQ, score of 129 is rated superior. The average IQ score is 100. About 7 percent of the population scores between 120 and 129.

    Full Answer >
    Filed Under:
  • Q:

    What is considered a high IQ?

    A:

    In most intelligence measurement systems, an intelligence quotient of over 130 is considered very superior; 120 to 130 is superior; from 110 to 120 is high average; and from 90 to 110 is average. About half of all people fall in the "average" category, according to the journal Science.

    Full Answer >
    Filed Under:
  • Q:

    What is a good IQ score?

    A:

    An intelligence quotient score over 140 is considered to signify a high level of intelligence. An IQ score over 160 is considered to be a genius-level intellect. The average IQ score is 100.

    Full Answer >
    Filed Under:
  • Q:

    What is the average person's IQ?

    A:

    The average person's intelligence quotient, or IQ, is by definition 100. The average will always be 100, which means that a person's IQ may change through time depending on the intelligence of people that are born or die.

    Full Answer >
    Filed Under:

Explore