Intelligence quotient, usually shortened to IQ, is a measure of how well someone uses information, logic, and reasoning compared to their peers. The first test for measuring IQ was developed by ...

IQ tests measure an individual’s cognitive abilities in domains including verbal reasoning, quantitative reasoning, logical inference, working memory, and pattern recognition. This test is not an IQ ...

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their ...

University of Liverpool provides funding as a founding partner of The Conversation UK. London School of Economics and Political Science provides funding as a member of The Conversation UK. Most adults ...

Psychologists administer IQ tests. Some psychologists don't test children younger than 4. Costs for testing can vary by the provider. Isla McNabb, a 2-year-old from Kentucky recently became the ...