My primary research interests are in philosophy of mind, philosophy of psychology, and cognitive science. I have worked especially on theories of consciousness, knowledge of our own propositional attitudes, the role of natural language in human cognition, and modularity of mind. But I have also published on such issues as: the mentality of animals; the nature and status of our folk psychology; nativism (innateness); human creativity; theories of intentional content; and defence of a notion of narrow content for psychological explanation.