Declining IQ of college graduates

Interesting data.  From Average IQ of College Undergrads and Graduate Degree Holders by Decade by Audacious Epigone.

Click to enlarge.

There is a logical explanation.

Today’s bachelor’s degree is the equivalent of a high school graduation certificate from fifty years ago, and today’s graduate degree falls short of a bachelor’s degree from a generation ago.

This is an inevitable consequence of increasing the share of the population that attends college. In the sixties, 10% of American adults had college degrees. Since then that figure has more than tripled, to 34% today.

More education for more people is not a bad thing but it is necessarily constrained by the real world value to be gained from that additional education.