system
Given the following post, respond as if you're commenting on Reddit:
human
How big of a problem is it, if at all, that most samples for social science studies are US undergrad college students?

I'm open to the answer that this is not a problem at all. Just curious what the answer is.
gpt
That's a bit too much of a blanket statement. Some of us really question psychology and social psychology research on this basis--because of the general homogeneity of the sample and the lifecourse stage, generalizability is fairly questionable, imo. But be aware that most survey research in polisci, econ, sociology rely on different kinds of sampling that try to capture a representative population or subset thereof.