A lot of what I learnt from psychology classes in college, (which I hated by the way), was stuff I could work out from observation of people. It's not hard to pick up little tells and ticks of people you are around for a prolonged period. And even new people you meet I often find you are catagorising minute details about their behaviour and idiosyncrasies and it isnt hard to discern a level of understanding of that person on a superficial level, as in drives, motives. The longer you spend with them the deeper you can delve.
My problem is I know things but I do not possess a language capable of putting it into any coherent verbalisation, thus I can act on it, but to explain how I came to that reasoning, which is often a correct speculation, is almost impossible.
I suppose the best summing up I can give of this is in real life, ive walked into a room and I can usually tell quite quickly where the tensions lie and where the groups are and how they fit together. The deeper psychologies of the mind are often less complex than people think, I tend to believe it all stems from the basic things; Needs and wants, likes and dislikes. Some of the most damaged people I met only needed something simple to be brought to the surface.
I even find the term superficiality to be inadequate because in my experiences a lot of problems actually start out superficial and are then tied back to deeper implications...just as much as the superficial problems can stem from the deeper implications.