Breaching Subjects’ Thoughts Privacy: A Study with Visual Stimuli and Brain-Computer Interfaces

Table 3

Results of the five experiments performed over ten subjects.

Experiments	Experiment 1			Experiment 2			Experiment 3			Experiment 4			Experiment 5			Summary
	✓	✗	?	✓	✗	?	✓	✗	?	✓	✗	?	✓	✗	?
Subject 1	2	1	0	3	1	0	1	2	0	1	2	0	0	2	1	7
Subject 2	3	0	0	2	2	0	2	1	0	1	2	0	0	3	0	8
Subject 3	2	1	0	3	1	0	1	2	0	1	2	0	0	3	0	7
Subject 4	2	1	0	1	3	0	1	2	0	3	0	0	0	3	0	6
Subject 5	1	2	0	2	2	0	2	1	0	2	1	0	0	2	1	7
Subject 6	1	2	0	1	3	0	2	1	0	0	3	0	0	3	0	7
Subject 7	2	1	0	1	3	0	0	3	0	2	1	0	0	3	0	8
Subject 8	1	2	0	0	3	0	1	2	0	1	2	0	0	2	1	3
Subject 9	1	2	0	1	2	0	2	1	0	3	1	0	0	2	1	7
Subject 10	2	1	0	3	1	0	2	1	0	1	2	0	0	3	0	8
Summary	17			16			14			16			0			68

Experiments, where a P300 was clearly detected, are marked with a ✓ symbol, whereas those experiments without its detection are indicated with an ✗ mark. Finally, those results that did not clearly present a P300 are highlighted with a “?” symbol.