IQ scores have substantially increased from 1932 through the 20th century, with differences ranging from three to five IQ points per decade, according to a phenomenon known as the ‘Flynn effect.’ But a new study has found evidence of a reverse ‘Flynn effect’ in a large U.S. sample between 2006 and 2018 in every category except one. For the reverse Flynn effect, there were consistent negative slopes for three out of the four cognitive domains.
Click here for original story, Americans’ IQ scores are lower in three domains, higher in one
Source: ScienceDaily