[charmides]

I don't think psychology is typically considered STEM.

[mcguire]

According to the article, it is by the NSF and not by the commerce department.

[Wowfunhappy]

Psychology sits in a really weird (and interesting!) place between the social sciences and "hard" sciences. I thus find either classification reasonable, as unhelpful as that may be.

[Eldandan]

It is institution-dependent, and a bit odd. I believe the American Psychological Association have advocated for this.

https://www.apa.org/monitor/2014/07-08/sd