Figure 2.

We have depicted the untransformed RT and accuracy values for the normal older control (NOC), amnestic mild cognitive impairment (aMCI), and Alzheimer disease (AD) groups (cf., Table 2). The aMCI group showed characteristic, slow RTs for nonmatching stimuli (1^st row, 2^nd column), and the AD group showed greater quickening with repetition (1^st row, 3^rd column). The AD group also showed uniformly poorer accuracy (2^nd row). # indicates the between-group difference between the AD group and both other groups for accuracy, and * indicates the within-group contrasts that drove significant mixed interactions with clinical group for RT.