Average IQ varies depending on geographic location, resource access, and much more.

American IQ test scores have dropped during a recent 13-year period, a remarkable finding that runs counter to the well-established trend of increasing IQ scores throughout much of the 20th century.

The Wechsler Preschool and Primary Scale of Intelligence (WPPSI ... An IQ test measures a person's reasoning ability. Most IQ test scores are determined using a baseline score of 100, the average ...

New research complicates the old consensus that IQ is largely fixed, and that's good news for anyone looking to boost 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 ...

Trends of 35-item composite ICAR scores stratified by education. Note. Data collection for the category "currently in graduate or professional school" did not start until August 2010. The dashed lines ...