* `participant_log.csv` is a logbook with notes about participants/sessions that was kept during data collection. It contains the following columns: * __ID__: participant number, e.g. "S01", "S28" * __session__: session number, i.e. "1" or "2" * __tDCS code__: identifies which stimulation (anodal or cathodal) was used in this session. See the `analysis.m` script in the `Code` component or `tDCS_blinding.md` for all the possible codes and the key relating them to tDCS polarity. * __time (planned)__: scheduled time slot for the session. * __duration (min)__: time between participant entry and exit, in minutes. N.B. at some point we stopped keeping track of this. * __wait time (min)__: time between tDCS offset and participant exit, in minutes. N.B. at some point we stopped keeping track of this. * __tDCS impedance (kOhm)__: value read off the tDCS device when using the manual impedance check, before onset of the trial stimulation. * __reward__: either €10 or 1 research credit (RC) per hour, so typically €50,- or 5 RCs in total. * __notes__: notes on signal quality, technical issues, participant quirks, etc. * `questionnaires/`contains the questionnaires (empty, see the `data` component for the data) that were administered * `tDCS_blinding.md`: contains information on the participant- and experimenter blinding procedure, including the keys linking all tDCS codes used in filenames with the actual tDCS polarities (anodal and cathodal).