[posterboy]

> Lack of formalization leads to a lot of problems, but I see no way to formalize the field

It seems that economics and sociology do play a role there. Both are heavy with statistics and game-theory. While Psychology is only looking at individual. Humans are more complex than fundamental particles and molecules. It's not chemistry or biology either. But Neuro-Science is most promising in this regard. "Nerven-Arzt" is a dated German term for Psychotherapist, after all.

On the other hand, what would a psychologist say to the urge to formalize everything? :)