One might think that it being the case that X rationally ought to A (exhibit some action or attitude in response to relevant items) is a straight-forward function of the reasons that X has for/against A-ing. And one might think that the sort of normative reason that is relevant here is of the subjective or psychological sort (specifically a broadly cognitive mental state — e.g., a belief or a perceptual experience). One supporting thought for this last thought is that normativity is, at its core, the direct guidance of responses via rational causal tendencies in the mind of the agent (we might call this the “direct rational guidance” view of normativity).
However, quite plausibly, the rational ‘ought’ is, in some respects, a function of appropriate response to facts, not just mental states.