In order to compare IQ scores of people of different ages, researchers compute the for children and the deviation IQ for adults.

Ratio IQ

Explanation:

IQ scores measures the ability of an individual to answering intelligent-based questions and solving problems relating to that.

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Ratio IQ is used especially by researchers for children and is derived by Dividing a child's mental age by his physical age and then multiply by 100. while Deviation IQ which researchers use for adults is derived by  dividing an adult's  test score by the average test score of people in the same age group and multiply by 100.

Answer is RATIO IQ.

Refer below.

Explanation:

In order to compare IQ scores of people of different ages, researchers compute the RATIO IQ for children and the deviation IQ for adults

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