Online tests suggest IQ scores in US dropped for the first time in nearly a century

submitted by Alphix from phys.org

sorted by:
top
newinsightfulfun
you are viewing a single comment's thread.

view the rest of the comments →

[–]Canbot 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (0 children)

tests taken by adults participating in the Synthetic Aperture Personality Assessment Project

Self selection bias. This bias will change over time because of social influences like how well known the study is, how interested in IQ people are, who is aware of the test.