The data were stored in BrainVision Format. The following stimuli were used:

-> R1 – this stimulus should not normally appear – if it does, it is likely a reaction to a goat
-> R2 – true  -  expected reaction to a sound assigned correctly to an animal (a dog barks or a cat mews)
-> R3 – false -  expected reaction to a sound assigned incorrectly to an animal (a dog mews or a cat barks )  
-> S1 – standard stimulus (a goat bleats) - non-target  the measured participant should not respond
-> S2 – a dog barks  - target – should be followed by the R2 marker 
-> S3 – a cat mews  - target - should be followed by the R2 marker 
-> S4 – a cat barks  - target -  should be followed by the R3 marker 
-> S5 – a dog mews - target - should be followed by the R3 marker 

-> S11 – a marker that denotes an occurrence of the standard stimulus (non-target) after the S2 stimulus
-> S12 – a marker that denotes an occurrence of the standard stimulus (non-target) after the S3 stimulus
-> S13 – a marker that denotes an occurrence of the standard stimulus (non-target) after the S4 stimulus
-> S14 – a marker that denotes an occurrence of the standard stimulus (non-target) after the S5 stimulus
 
Note: The S11  -  S14  stimuli are typically ignored in the phase of analysis because they could distort the results.

Probabilities of occurrences:
S1 – 70%  
S2 – 15% 
S3, S4, S5  – 5%  


The following files were stored:


Data files:
-> Auditory_ERP_gender_date_id.eeg - a binary file containing raw data

Header files:
-> Auditory_ERP_gender_date_id.vhdr - a text file containing metadata describing raw data in the .eeg file
			
-> Auditory_ERP_gender_date_id.vmrk - a text file containing markers used in the experiment	
			
Recording Software
For recording and storing the EEG/ERP data, the BrainVision Recorder 1.2 was used. The Recorder was initialized using the following parameters:

1) the sampling rate was set to 1 kHz
2) the number of channels was set to 19
3) the resolution was set to 0.1 µV



