Barsalou's theory of perceptual symbol systems is
considered from a metacognitive perspective. Two examples are discussed
in terms of the proposed perceptual symbol theory. First, recent results
in research on feeling-of-knowing judgement are used to argue for a
representation of familiarity with input cues. This representation
should support implicit memory. Second, the ability of maintaining a
theory of other people's beliefs (theory of mind) is considered and
it is suggested that a purely simulation-based view is insufficient to
explain the available evidence. Both examples characterize areas where
Barsalou's theory would benefit from additional detail.