I wouldn't expect totally random because people have common sense. I'd expect it to be similar to the folk-wisdom of the time, since a lot of it is going to be repackaging of that same folk-wisdom, and negative results tend not to get published, or get massaged until they're positive.

I'd expect social-psychology to mirror the dominant opinions of people in other segments of the humanities, although it is of course hard to determine the direction of that relationship.