 Agential experience is defeasible, and cognitive and social psychology and more recently neuroscience have been probing the determinants of choice and its relationship to conscious awareness. One particular form of study has been taken by many to undermine the veridicality of the experience of conscious control over arbitrary choice. Libet 1999 and more sophisticated successor studies aim to compare the self-reported time of occurrence of conscious choice with the time of occurrence of certain brain activity (a steadily increasing “readiness potential”) that Libet took to be associated with the production of the subsequent action. He interpreted the results as indicating that the behavior was unconsciously initiated by that brain activity just prior to the time of the subject’s awareness of having so chosen, and hence that the agent’s sense that she consciously initiated the action is illusory.