Isn't this an apples/oranges thing? Can we really compare mental illness as defined/understood today with the 1930's? Back then psychology was in its infancy.

Isn't this an apples/oranges thing? Can we really compare mental illness as defined/understood today with the 1930's? Back then psychology was in its infancy. Wouldn't it make more sense that back then they just didn't know as much, therefore didn't attach defects to kids as readily? tl;dr -- this reeks of sensationalism and junk science.