Event-Related Potentials (P300, EEG) - BCI dataset

The EEG data were acquired from 16 healthy young adults (age range 22 - 30 years) with no neurological, physical, or psychiatric illness history. All the participants were naive BCI users who had not participated in any related experiments before. Informed consent was received from all participants.   

 Scalp EEG was recorded using 16-channel, active Ag/AgCl electrodes (g.USBamp, g.LADYbird, Guger Technologies OG, Schiedlberg, Austria) with a sampling frequency = 256 Hz. EEG electrodes were positioned according to the International 10-20 system. The right earlobe of participants was used for a ground electrode, whereas the FCz location was used for a reference electrode. 

The total number of target letters that a participant had to attend was equal to five. These targets were presented in five consequent sequences with an inter-sequence duration (ISD) of two seconds. In total, five repetitions of each target character were made where one repetition (or trial) consisted of a complete set of 12 random flashes of every row and column (six rows and six columns). The inter-stimulus interval (ISI) was set to 150 ms; likewise, the stimulus duration was 100 ms (i.e., the time length a row/col is highlighted). The minimum time between the same target letter highlights was set to 600 ms, also denoted as a target-to-target (TTI) interval. The stimulus onset asynchrony (SOA) was set to 250 ms. The SOA is the period between starting one stimulus event and the beginning of the next event.