Could IQ scores be a false indicator of intelligence? Researchers have determined in the largest online study on the intelligence quotient (IQ) that results from the test may not exactly show how ...

IQ scores have decreased in the US for the first time in decades, new research from scientists at Northwestern University and the University of Oregon suggests.

A new brain-imaging study finds that during adolescence, a child can gain or lose as many as 20 points in IQ.

IQ scores have been steadily falling for the past few decades, with changes in our environment and the way we are learning thought to be reasons why, a new study suggests.

American IQ test scores have dropped during a recent 13-year period, according to a newly published study. That's a remarkable finding that runs counter to the well-established trend of increasing ...