Why people may change their mind without new information?!

"The observation that motion energy supports both the initial and final choices provides evidence against two main alternatives to post-initiation processing: (1) change of decision based on recall and/or reconsideration of evidence acquired before initiation¹⁸, and (2) correction of an initial motor error perhaps due to confusion about the stimulus–response mapping¹². The analysis instead supports a non-decision time in which information from the stimulus arrives too late to affect an initial decision but is present to refine it after the brain has committed to a particular response and action(Nature)."