[P1–473]: DOES PERFORMANCE ON COGSTATE VARY LONGITUDINALLY ACROSS DIFFERENT MODES OF ADMINISTRATION?. (1st July 2017) - Stricker, Nikki H.; Lundt, Emily S.; Edwards, Kelly; Machulda, Mary M.; Roberts, Rosebud O.; Knopman, David S.; Petersen, Ronald C.; Mielke, Michelle M.