Theorists are converging from quite different quarters on a version of the global neuronal workspace model of consciousness, but there are residual confusions to be dissolved. In particular, theorists must resist the temptation to see global accessibility as the cause of consciousness (as if consciousness were some other, further condition); rather, it is consciousness. A useful metaphor for keeping this elusive idea in focus is that consciousness is rather like fame in the brain. It is not a privileged medium of (...) representation, or an added property some states have; it is the very mutual accessibility that gives some informational states the powers that come with a subject's consciousness of that information. Like fame, consciousness is not a momentary condition, or a purely dispositional state, but rather a matter of actual influence over time. Theorists who take on the task of accounting for the aftermath that is critical for consciousness often appear to be leaving out the Subject of consciousness, when in fact they are providing an analysis of the Subject, a necessary component in any serious theory of consciousness. (shrink)

As I see it, the science of consciousness is all about relating _third-person data_ - about brain processes, behavior, environmental interaction, and the like - to _first-person data_ about conscious experience. I take it for granted that there are first-person data. It's a manifest fact about our minds that there is something it is like to be us - that we have subjective experiences - and that these subjective experiences are quite different at different times. Our direct knowledge of subjective (...) experiences stems from our first-person access to them. And subjective experiences are arguably the central data that we want a science of consciousness to explain. (shrink)

A traditional view is that scientific evidence can be produced only by intersubjective methods that can be used by different investigators and will produce agreement. This intersubjectivity, or publicity, constraint ostensibly excludes introspection. But contemporary cognitive scientists regularly rely on their subjects' introspective reports in many areas, especially in the study of consciousness. So there is a tension between actual scientific practice and the publicity requirement. Which should give way? This paper argues against the publicity requirement and against a fallback (...) version of it, viz. that evidence-conferring methods must at least have their reliability publicly validated. (shrink)

Epistemic divergence occurs when different investigators give different answers to the same question using evidence-collecting methods that are not public. Without following the principle that scientific methods must be public, scientific communities risk epistemic divergence. I explicate the notion of public method and argue that, to avoid the risk of epistemic divergence, scientific communities should (and do) apply only methods that are public.

Consciousness researchers standardly rely on their subjects’ verbal reports to ascertain which conscious states they are in. What justifies this reliance on verbal reports? Does it comport with the third-person approach characteristic of science, or does it ultimately appeal to first-person knowledge of consciousness? If first-person knowledge is required, does this pass scientific muster? Several attempts to rationalize the reliance on verbal reports are considered, beginning with attempts to define consciousness via the higher-order thought approach and functionalism. These approaches are (...) either problematic in their own right, or ultimately based on a first-person access to consciousness. A third approach assumes that scientists can trust verbal reports because subjects reliably monitor or ‘introspect’ their conscious states. This raises the question of whether the reliability of introspection can be validated by independent criteria. Merikle's attempts to validate this reliability are shown to involve some unavoidable circularity. It is conjectured that scientists’ reliance on their subjects’ verbal reports tacitly appeals to their own introspective reliability, which is not independently validatable. Some epistemologists might conclude that this renders scientists’ conclusions about conscious states unjustified, but I argue that this does not contravene the constraints of a proper epistemology. (shrink)