Fig. 3

Block implementation with timeseries of a complete experimental series for exemplary participants. (a) Session design for Experiment 1. Each session consisted of four 10-min Stim Off periods interleaved with three 10-min Stim Enabled periods A given stimulation condition was assigned to each Stim Enabled period, and applied in 4 consecutive 30 sec trials (Stim Trial # 1, 2, 3, 4). Experimental implementation, including EEG (Cz electrode) and CTT timeseries, for participant 10’s (b) first, (c) second, and (d) third sessions of Experiment 1. (e) Session design for Experiment 2. EEG and CTT timeseries for participant 24’s (f) first and (g) second session implementation. One stimulation condition (either M30 or F30; cartoon insets) was repeatedly applied during each session. In each session of Experiment 2, an initial 20-min Stim Off period, was followed by 50-min Stim Enabled period which included 20 trials of stimulation. Timeseries triggers in EEG data (vertical dashed lines) are marked with trigger codes. Across all sessions, for both experiments, EEG (teal) and CTT performance (pink), as well as physiology (not illustrated), were acquired continuously.