Giftedness and genius are often used interchangeably, but they refer to different things. Giftedness is a term that refers to ...

People often talk about very high intelligence quotient (IQ) scores, often referred to as genius IQ scores, but what exactly do these numbers mean and how do they stack up? How do IQ scales break down ...

An IQ of 140, when viewed in a distribution with a mean of 100 and a standard deviation of 15, is approximately the top 0.4%, ...

The term genius refers to someone with extraordinary intellectual or creative power. Psychologists in the early 1900s were the first to measure and define genius in terms of a person's intelligence ...

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 ...