Classification of BCI Users Based on Cognition

Table 1

Task properties and expected physiological effects.

Task	Task properties	Expected main risk factors	Expected physiological effects
P300/1	(i) Creating cognitive load; (ii) Constant attention requirement; (iii) Intense visual stimulus	(i) Excessive cognitive loading; (ii) Increased stress in case of spelling incorrectly	(i) Pupil dilation; (ii) Increase in GSR value; (iii) Increase in blink rate
P300/2	(i) Creating cognitive load; (ii) Constant attention requirement; (iii) Very intense visual stimulus	(i) Excessive cognitive loading; (ii) Increased stress in case of spelling incorrectly	(i) Pupil dilation; (ii) Increase in GSR value; (iii) Decrease in blink rate
SSVEP/1	(i) Monotony; (ii) Constant attention requirement; (iii) Intense visual stimulus	(i) Drowsiness effect	(i) Pupil contraction; (ii) Decrease in GSR value; (iii) Decrease in blink rate
SSVEP/2	(i) Monotony; (ii) Constant attention requirement; (iii) Intense visual stimulus	(i) Drowsiness effect	(i) Pupil contraction; (ii) Decrease in GSR value; (iii) Decrease in blink rate
MI/1	(i) Focusing on a thought; (ii) Constant attention requirement; (iii) Low intensity visual stimulus	(i) Drowsiness effect; (ii) Inability to focus	(i) Pupil contraction; (ii) Decrease in GSR value; (iii) Decrease in blink rate
MI/2	(i) Focusing on a thought; (ii) Constant attention requirement; (iii) Constantly following an additional stimulus on the screen	(i) Excessive cognitive loading; (ii) Increased stress due to instant feedback	(i) Pupil dilation; (ii) Increase in GSR value; (iii) Increase in blink rate