Reaction time distribution varies for ‘remember,’ ‘novel’ and ‘know’ trials. Reaction time distribution and mean RT for A) ‘remember,’ B) ‘novel,’ and C) ‘know’ trials. X-axis is reaction time (msec); Y-axis is number of trials in each bin, summed across all 12 subjects. Only correct ‘remember,’ ‘novel,’ and ‘know’ responses are included.