Figure 6.

Absolute neural variability in the prestimulus interval, but not the poststimulus interval, predicts perceptual performance. A, Time courses of absolute trial-by-trial variability in the first (left) and second (right) stimulus intervals. B, Correlations between perceptual measures (slope and threshold) and prestimulus variability. C, Correlations between perceptual measures (slope and threshold) and poststimulus variability. Each dot represents a single subject. Asterisks indicate significant correlations as assessed by a randomization analysis (p < 0.05).