Figure 6.

Summary of subject-level analysis of the linear relationship between alpha power and SSR attentional modulation. a, The topographical distribution of group-averaged (N = 17) regression coefficients β (slopes) for SSR evoked power (top row) and SSR intertrial coherence (ITC, bottom row), separated by SSR frequencies of 10 Hz (left column) and 12 Hz (right column). Hot colors indicate a positive linear relationship, and cool colors a negative relationship. Black dots in the top right panel indicate a cluster of electrodes showing a systematic effect (p < 0.05, cluster-based permutation test) absent in tests illustrated in the other three panels. b, Results of sensor-by-sensor group-level Bayesian inference (Bayesian t tests) of regression slopes against zero, plotted as topographies on a log(BF₁₀) scale. Plots arranged as in a. Red colors indicate stronger evidence for H₁, and gray colors indicate stronger evidence for H₀. Black lines in the color scale below scalp maps denote thresholds that signal moderate evidence for H₀ (log(1/3) = −1.099) or H₁ (log(3) = −1.099) by convention. Superimposed black dots indicate clusters showing systematic attention effects on SSR evoked power/ITC as depicted in Figure 4 for comparison.