In short, it seems that Richard A. Kasschau preferred this behavior therapy to psychoanalysis since it concentrates more on action rather than just a talk, and it is not as time-consuming as psychoanalysis is at all.
Should you write whether or not you agree?
I think this is good advice. At the end of the essay, maybe you can give an opinion, too. It seems like you leave the reader wondering a little at the end.
Behavior therapy is a lot less abstract than psychoanalysis, so it is ...maybe... easier.
If you are interested in the various schools of thought in psych, I recommend reading about Ellis' "rational-emotive behavior therapy."