Abstract
Although a claim that attention and awareness are different has been suggested before, it has been difficult to show clear dissociations due to their tight coupling in normal situations; top-down attention and visibility of stimulus both improve the performance in most visual tasks. As proposed in this workshop, however, putative difference in their functional and computational roles implies a possibility that attention and awareness may affect visual processing in different ways. After brief discussion on the functional and computational roles of attention and awareness, we will introduce psychophysical methods that independently manipulate visual awareness and spatial, focal top-down attention and review the recent studies showing consciousness without attention and attention without consciousness.