PROBLEMS 'Consciousness is both the most obvious and the most mysterious feature of our minds' (Dennett, 1987). Part of the problem arises from its privacy, and part from the fact that at present it is a pretheoretical term (Johnson-Laird, 1983a). Indeed, Gray (1971) suggests that these two issues are related, in that the reason why psychology lacks a theory of consciousness is that consciousness has arisen as a datum from our own experience and has been generalised to others inductively by analogy. Explanatory links are missing between conscious and other processes. We are therefore unable to specify its nature or its relations to behavioural and physiological processes.