Fig. 4

Overview of the normalized acceleration data magnitude calculated from the Muse S headband and the Empatica E4 watch, utilized for data synchronization between the wearable devices. The shake start and end times are prominently visible by abrupt changes of acceleration magnitude, while the duration of shaking activity per sensor is similarly about 12 seconds. To form the pre-processed and labeled physiological data from the controlled sessions, the time series were aligned between the shakes using the Python package Jointly²⁰. For the data recorded in the uncontrolled sessions, the labeled data in the Labeled folders of each participant were extracted using the same timestamps from both the wearable devices rather than the sensor synchronization using Jointly. This decision was met as some participants had forgotten to shake the devices either at the beginning, at the end, or at both times of the respective recording in the uncontrolled environments.