EEG data recorded in three mental states

Electroencephalographic (EEG) signals were acquired from 17 (14 males, 3 females) participants aged between 20 and 30 years. 
The input data were gathered for the signal processing algorithms during sessions lasting for approximately 20 minutes. Each session consisted of three tasks performed by the subjects:
- relaxation with closed eyes - before this task execution the subjects were asked to relax in order to induce mental states associated with such an activity,
- watching a music video - music genre chosen for this task was folk metal due to the engaging and lively character of this music style which creates an opportunity to induce mental states that were being of an opposite type to those ones in the preceding task,
- playing a logic game, the game used at this stage of the experiment was Netwalk logic computer game, in which a player had to rotate elements of the board in such a manner, that a connection was being established between a single central element called server and multiple peripheral elements called computers.
The data is stored in EDF (European Data Format) file format.