If psychologists can, as they say, really identify perception (of an object) without awareness (of that object), they must have a reasonably clear operational grasp of what perception and awareness are. If so, philosophers can learn something from them. After settling on a test (at least a sufficient condition) for perception of x, the subjective test for awareness (you are not aware of x if you cannot detect it) is examined and found wanting by looking at such phenomena as split brains, change blindness, and unilateral neglect. An epistemic test is proposed in its place: S is consciously aware of x only if information about x is available to S as a reason for doing or believing something, as opposed to a reason why S does or believes something.
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