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The average IQ of a population is defined as 100. The deviation above or below that average is then calculated using the results of an IQ test.

And IQ test is a series of questions which have to be answered in a limited time. The accuracy and speed of the answering individual corresponds to their IQ.

If someone answers the questions really fast, and gets them mostly correct, then he/she is pretty smart and will reflect a higher IQ score than the average population.

A college / university graduate can be expected to have an IQ in the range 125-130 , though many are higher.

In the other direction someone with an IQ of 70 or below will be noticeably 'slow'.

An example of an very common IQ test is the Stanford-Binet intelligence scale

Intelligence tests can be biased towards certain populations, for example, illiterate or poorly sighted people can have high IQs, but will do very badly on a written IQ test. Some of the test questions may be biased to cultural values - eg. questions may relate to the Roman alphabet, which is meaningless to people who use different alphabets.

Recent testing has explored the time it takes someone to solve a problem using electronic measurement of brain waves. As a problem is presented there is a spike in brain activity, which tapers off rapidly when the problem is solved. Different people resolve questions faster (or slower) than others and response speed is closely linked to traditional IQ. Problems are however still stated in ways which can have a cultural bias.

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11y ago
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6d ago

An intelligence quotient (IQ) is calculated using standardized tests that measure various cognitive abilities such as problem-solving, learning ability, and memory. The score is derived by comparing an individual's performance on these tests to the performance of a norm group of the same age, resulting in a numerical value that represents a person's relative intelligence compared to others.

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15y ago

The person does a standardised test. Their score is then expressed as a percentage of the average score.

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12y ago

you measure your IQ by taking an IQ test. 100 pts is average, anything below that means your stupid. if your IQ is from 120-140, you are gifted, and 180 is a genius

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Q: How is an intelligence quotient calculated?
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