Since the latter part of the 19th and early 20th centuries, intelligence tests have attempted to measure human intellectual capabilities. The most common assigns an intelligence quotient, or IQ, score ...

Most adults never have to take an IQ test. But tests for assessing students’ cognitive abilities, such as the cognitive ability test (Cat), are used in schools around the world. These tests are very ...

Asking people to exert more effort on a test of mental ability does not actually improve their score. A recent study published in Intelligence & Cognitive Abilities found that while financial rewards ...

Who has the highest IQ in history? One answer would be: a 10-year-old girl from Missouri. In 1956, according to lore, she took a version of the Stanford-Binet IQ test and recorded a mental age of 22 ...

This 1937 version of the Stanford-Binet Intelligence Scales was produced in the United States. It used objects because this IQ test was aimed at children. Credit: SSPL/ Getty Images The Hechinger ...