Fig. 1

(A) Study protocol for experiments in the controlled laboratory environment. Participants performed two sessions of approximately two hours duration, with each task lasting ten minutes and no rest between tasks. Before task transition, participants answered questionnaires designed to rate their mental state during the previous task. (B) Study protocol for experiments in the uncontrolled environments. Participants performed self-guided sessions until approximately four hours of data had been recorded in total. (C) In the first appointment, each participant was instructed on proper sensor placement, after which the first controlled recording took place. Subsequent recordings in self-chosen environments followed at participant-chosen times, while the participants had the sensors temporarily in their possession. The data recording per participant terminated with a final data recording in the controlled environment, resulting in a timely distribution of A-B⁺-A, spanning a variable number of days and participant-chosen duration of recordings.