Well, sadly, you have missed the point. When the author uses the term "Psychology", he is implying the popular use of the term and how it is practiced in the western world today. Obviously he is not proposing that the "study of the mind" is evil.
It is akin to saying nuclear weapons are evil. Obviously nuclear weapons are merely an object and are inherently neutral. Psychology as a concept is not evil - it is the popular practice of psychology which does not align with scripture.
Defining psychology as you have below is like calling pornography "love-making":
xzins: "It involves the functioning and biology of the brain and goes from there to an attempt to understand how individual behavior is affected by that mind. It's really no different than understanding how the function (or malfunction) of the heart has certain physiological responses.)"
I think I said that psychology has a definition, and that it isn't all that terrible.
Isn't it amazing how two people can differ on what one person said?