You may be interested in Dr. Dan Siegel's approach (he's a psychiatrist). He has spent 30 years, in tandem with seveal dozen other highly respected scientists from as many as 12 different disciplines, developing 'interpersonal neurobiology," which has as oneof its primary aims "to disentangle whichever level/aspect? is affecting any specific condition in relation to all the others.

He's not the greatest writer, and his text book, The Developing Mind, is a tough read. Buth is more popular book, Mindsight, is an excelent collection of clinical stories regarding his approach. Don't worry, it's not just speculation. He told his graduate students, when the 2nd edition of Developing Mind came out, to look through more than 2000 research studies with THE EXPRESS AIM of finding material to refute ANYTHING in the first editiion. The guy is very sincere, if nothing else. I think he's quite brilliant. His book Aware deserves a Nobel Prize, I think. If he doesn't get it, someone in the next 2 or 3 decades with the same approach will get it, and it will be far more important than the Nobel Prizes just given out in physics.