Table 2. Signal Sensitivity and Response Bias.

Mean ± standard deviations are reported for sensitivity (d′) and response bias (c) for each stimulus modality condition for controls and non-semantic primary progressive aphasia.

d′	Control	PPA
Visual Objects	1.64 ± 0.17	1.31 ± 0.39
Auditory Words	1.42 ± 0.22	0.71 ± 0.51
Visual Words	1.50 ± 0.28	0.95 ± 0.51
c	Control	PPA
Visual Objects	0.86 ± 0.09	0.80 ± 0.19
Auditory Words	0.96 ± 0.14	0.75 ± 0.30
Visual Words	0.97 ± 0.12	0.82 ± 0.25