Figure 4.

The relationship between cue‐related alpha band modulation and behavioral performance. (A) The correlation between alpha power modulation (“No‐Remember” versus “Remember” cue; 10 Hz; 1–2 s) from signals in the posterior parietal cortex (local maxima of the source reconstruction of “No‐Remember” versus “Remember” cue in Fig. 3E; MNI coordinates x, y, z = [−8, −58, 32]) and memory performance (assessed by the standard d‐prime measure calculated by R‐hits versus false alarm rates) over subjects was highly significant (r = 0.52, P = 0.01). (B) The same correlation as in (A) with respect to compliance (assessed by the standard d‐prime measure calculated by R‐hits versus NR‐hits rates) over subjects was also highly significant (r = 0.66, P < 0.001). (C) The regression values between the difference in the alpha band at source level (“No‐Remember” versus “Remember” cue; 10 Hz; 1–2 s) and compliance (cluster‐level permutation, P < 0.05). We found that subjects with a stronger difference in cue‐directed alpha activity in posterior parietal regions were also the subjects who were able to perform the task better. [Color figure can be viewed in the online issue, which is available at http://wileyonlinelibrary.com.]