Raw scores on IQ tests for many populations have been rising at an average rate of three IQ points per decade since the early 20th century, a phenomenon called the Flynn effect. …

Dec 11, 2025 · IQ, (from “intelligence quotient”), a number used to express the relative intelligence of a person. It is one of many intelligence tests.

Sep 5, 2025 · By design, the average intelligence quotient (IQ) is 100 for all people, with scores that assess your ability to think, understand, reason, learn, and remember.

Nov 13, 2025 · An IQ test, short for "intelligence quotient", is an assessment that measures a range of cognitive abilities and provides a score that is intended to serve as a measure of an …

Nov 27, 2025 · Intelligence quotient (IQ) is a standardized score that expresses how far an individual’s performance on an intelligence test lies above or below the average for their age …

Nov 4, 2025 · Terman introduced the term Intelligence Quotient (IQ), defined as the ratio of mental age to chronological age, multiplied by 100. Thus, an individual whose mental age …

Dec 16, 2025 · An IQ score scale is a standardized system that reports IQ test scores so that they are centered at 100, with most people scoring between 85 and 115. The scale follows a …