This experiment is hard to understand because it never says how much time it took him to make the decision after the question was asked. When I think about decision-making experiments, I kind of assume that the experimenters are asking questions with a fast answer. There would maybe be 6 seconds TOTAL between the question being asked and the button being pushed, during which the person is processing the question. So that means the brain activity indicating a decision being made happened RIGHT when the questioned was asked and it took 6 seconds for the person to turn this into action.
How do they know that that first sign of the decision-making, though delayed from the moment when the person "figures it out", is not a conscious decision? They already said that it's known to be influenced by beliefs. That sounds like an intelligent, changeable process to me.
Maybe I'm not getting what they mean by "conscious".