Figure 3
From: Neural oscillations promoting perceptual stability and perceptual memory during bistable perception
Longer percept durations correlate with higher alpha and beta amplitudes. (A) An example EEG recording over 12 s of continuously viewing the Necker cube. The signal was bandpass filtered in the alpha band (8–13 Hz) (black curve) and then Hilbert-transformed (red curve is the amplitude envelope). Dashed lines indicate times of button presses and color indicates whether the green-fronted cube or blue-fronted cube is reported as perceived. (B) Scatter plot shows all percept durations (n = 157) and the mean alpha amplitude during each percept (from channel Oz) for a single subject, from cube trials in the continuous-viewing condition. (C) Top: Violin plots show the distribution of Spearman rho values (calculated between EEG amplitude and percept duration over all percepts) across subjects for channel Oz (*p < 0.05, one-sample t-test on Fisher-z-transformed rho values, df = 23). Bottom: Topo-plots show group-averaged Spearman rho values. Black dots indicate channels with significant Spearman correlation (one-sample t-test on Fisher-z-transformed rho values, N = 24, corrected using cluster-based permutation test and thresholded at p < 0.05, two-tailed). Data for cube trials are shown here (see Fig. S3 for face-vase trials).
