Don't think so: I believe that a psychologist is someone who has studied psychology - they might not actually practice psychiatry, whereas a psychiatrist or psychotherapist is a practitioner.
Maybe the US and UK have different definitions, or maybe I'm just wrong.
I agree both should work. The technical distinction (in the US at least) is that psychiatrists are medical doctors who can prescribe drugs, while psychologists are more on the therapy side. I wasn't aware there was any such distinction with the slang term "shrink", though.
Psychiatrists have a doctorate in medicine, whereas a psychologist does not. Both can practice therapy, but the psychiatrist can prescribe drugs because they have a medical license. That is how it is in Canada, I believe.
It was probably the best book I've ever read. I wouldn't recommend it to someone who never read her stuff before, though. The Virtue of Selfishness is probably better as an introduction.
One of many ways to illustrate that character was an idiot was that ridiculous interpretation of the novel - the polar opposite of what it actually espoused.
Maybe the US and UK have different definitions, or maybe I'm just wrong.