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Intelligence Quotient

Intelligence Quotient, or IQ, is a score used by standardized tests as a means of describing one’s intelligence level. The formula for IQ is (mental age / chronological age) x 100. An average score is 100; about 95% of IQ scores fall between 70 and 130.

Example: After taking an IQ test, a precocious little girl learns that her score is an above-average 120.

Intelligence Quotient
APA Reference
Grinnell, R. (2018). Intelligence Quotient. Psych Central. Retrieved on July 8, 2020, from