The links that you gave were primarily Gestalt Theory, I'm referring to Gestalt Therapy (There is a bit about Therapy on the first one). Although it wouldn't seem so, there is quite a bit of difference between the two. Gestalt Therapy is grounded in theory, but the techniques that the therapy uses are no where covered by in the theory aspect.
If you would like to learn more about the therapy aspect, look up Fritz Perls, he is the founder of this.
