.  In the Introduction, you now provide a very clear hypothesis: "Our main hypothesis is that change detection in complex, statistically defined, textural stimuli requires the accumulation of sensory evidence, and that the degree to which the neural system performs the accumulation covaries with the level of task involvement."  Please, in the Discussion, summarize in clear and simple terms the status of your hypothesis - I believe that you provide convincing evidence in its favour, but this is not really clearly specified and it should be. This might go together with the nice ending 