Research Article
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 |
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