A recent study of cognitive analyses says the average intelligence quotient, or IQ, in the United States is about 98.

Identical twins who were raised apart may have IQ differences similar to those of total strangers, according to new research.

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

New research suggests that education can raise IQ by up to 15 points—even among identical twins—challenging determinism and revealing intelligence to be more malleable than we once believed.

A new analysis of studies spanning the last century finds that differences in schooling appear to explain a large portion of ...