Sensory stimuli dominate over rhythmic electrical stimulation in modulating behavior
Fig 2
Experiment 1, tACS effects. (a) Realignment procedure.
The optimal tACS lag (orange asterisk) was determined from the cosine function fitted to the entAmp-FM by tACS phase-lag data (dashed gray line). The phase bin closest to the optimal phase was identified (pink asterisk). This bin was set to zero phase and the remaining phases were wrapped around. The new realigned data is shown in blue. (b) EntAmp-FM as a function of tACS separated by modulation depth. The tACS lags correspond to the individually realigned lags; phase zero represents the individual optimal tACS lag estimated in (Fig 1I). EntAmp-FM values from the realigned peaks and troughs (semi-transparent) were excluded from further analyses. (c) Procedure for obtaining entAmp-FM at the optimal half-tACS cycle (tACS(+)) and its opposite (tACS(−)). (d) EntAmp-FM as a function of tACS separated by modulation depth. (e) Estimated marginal means, showing the main effects of the tACS condition and modulation depth (ModDepth). (f) EntAmp-FM differences between the three tACS conditions in (c) normalized (z-scores) to permuted distributions. (b, d, f) Each dot represents a single participant. Box plots show median (horizontal black lines), mean (black cross), 25th and 75th percentiles (box edges) and extreme datapoints not considered outliers (±2.7σ and 99.3 percentiles, whiskers). Red crosses represent outliers (more than 1.5 of the interquartile range away from the bottom or top of the box). *p = 0.05, **p < 0.001. Numerical data for panels b, d, and f can be found in [32].