The World's Smartest People

American students may not perform that well on math and verbal tests, but the U.S. is still a magnet for brainpower.

Intelligence

Reading a road map upside-down and generating synonyms for the word "brilliant" are two very different skills. But each is a measurable indicator of general intelligence, a construct that includes problem solving abilities, spatial manipulation and language acquisition. Scientists generally agree that intelligence can be captured by psychometric tests.