Rationalism, Empiricism, Sentimentalism

In some circles, Rationalism vs. Empiricism is an Epistemological debate, but the conflict also applies to Psychological and Moral theories.  In those, the Rationalist holds that one can and/or should be motivated by Reason.  In contrast, the Empiricist, sometimes better known as a Sentimentalist, asserts that only Pleasure and Pain have motive power, with Reason functioning only as a means in pursuing the former and avoiding the latter.  That thesis is itself Psychological, usually classified as Hedonism, but since it recognizes an indeterminacy in the means to its ends, it recognizes the possibility of better or worse means, via the aid of Reason, the result of which are varieties of Moral Sentimentalism, e. g. some Eudaimonisms, Prudentialism, Utilitarianism, etc.  Now, while, in some cases, Empiricism entails Sentimentalism, e. g. Hume, most notably, in other cases it does not.  For example, Aristotle is an Empiricist insofar as he conceives that the seeking of Knowledge begins with immediate sense observation.  But, both Psychologically and Morally he is a Rationalist, since he asserts that human behavior can and ought to be controlled by Reason, i. e. by his concept of a Mean.