 The belief theory (and related theories, like the judgement theory of Craig (1976)) is a specific version of the intentional theory. But it is not the most widely accepted version (though see Glüer (2009) for a recent defence; and Byrne (forthcoming)). Intentionalism is, however, not committed to the view that perceptual experience is belief; experience can be a sui generis kind of intentional state or event (Martin (1993)).