ABSTRACT
If you were asked to describe several people whom you know well, you would probably use a rather different set of descriptive terms for each. Joe is a happy-go-lucky guy who loves sports and loathes studies. Betty is religious and is pretty prim about a lot of things. Jack wants to get into medical school but he has a hard time keeping out of campus politics. This kind of knowledge of Joe, Betty, and Jack is very useful to you, especially if you must interact with them. But for our purposes, the information is too particular. We are tremendously interested in the fact that individuals show a high degree of psychological organization. What we need, however, are ways of describing this organization that
are general enough to capture Joe, Betty, and Jack, and many others with them, in the same net.
