Uh-oh, reverse Flynn effect edition

A reverse Flynn effect was found for composite ability scores with large US adult sample from 2006 to 2018 and 2011 to 2018.

Domain scores of matrix reasoning, letter and number series, verbal reasoning showed evidence of declining scores.

Three-dimensional rotation scores generally increased from 2011 to 2018.

Differences in ability scores were present regardless of age, education, or gender.

The steepest slopes occurred for ages 18–22 and lower levels of education.

That is from a new paper by Elizabeth M. Dworak, William Revelle, and David M. Condon.  Alex T. comments.