Taiwan and Hong Kong also recorded very high scores, around 107. However, they were not included in the final country rankings.

Observational skills puzzles are designed to test and improve a person's ability to notice details, patterns, and differences in visual or logical scenarios. These puzzles often require close ...

The current study of the effect of lead on cognition concludes that a total of 824,097,690 million IQ points were lost because of childhood lead exposure among the US population by 2015, an average of ...

Times-Union readers want to know: I received an email with a chart that supposedly ranks the intelligence quotients of U.S. presidents, along with the claim that President-elect Donald Trump would ...

A rigorous nine-year research review looking at the relationship between fluoride and intelligence in children concludes that as fluoride levels rise, IQ drops. Every 1 part per million increase in ...