Intrinsic perspectives, object feature binding, and visual consciousness

Van der Velde and I agree on two fundamental issues surrounding the vision-related binding problem and recent solutions that have been offered: (1) that tagging theories, such as neuronal synchrony, fail to account for object feature binding in visual consciousness; and (2) that feedforward-feedback processes in the visual cortical hierarchy play a role in generating a feature-unified object of visual consciousness. Van der Velde develops and discusses an important objection to tagging theories that could help to strengthen my critique of neuronal synchrony (and other tagging theories), and then argues that the cognitive subject makes no explanatory contribution to the unity of an object's features in visual consciousness. These issues are discussed in turn. By contrast, van Leeuwen takes a more critical approach to my article. A two-fold response to van Leeuwen is offered: first, the root of his perplexity is uncovered and then some specific objections that he poses to my critique of neuronal synchrony, as a purported solution of the object feature binding problem, are addressed.