Computational Intelligence and Neuroscience

Research Article

Sinc-Windowing and Multiple Correlation Coefficients Improve SSVEP Recognition Based on Canonical Correlation Analysis

Table 1

Detailed accuracies (%) for each subject and run and for all combinations of methods, with a window length of 1.5 s. The last rows of the table summarize the average and peak accuracy of each combination, together with the average and peak increment with respect to classical CCA.


	CCA (1 corr)	CCA (2 corr)	CCA (3 corr)	CCA (4 corr)	CCA (5 corr)	CCA (6 corr)	CCA (1 corr) + sw	CCA (2 corr) + sw	CCA (3 corr) + sw	CCA (4 corr) + sw	CCA (5 corr) + sw	CCA (6 corr) + sw

S01
Run 1	92.2	96.1	96.1	96.9	96.9	96.9	91.4	93.8	95.3	95.3	96.1	96.1
Run 2	92.2	93.8	95.3	95.3	95.3	96.1	89.8	93.8	92.2	93.0	93.0	93.0
Run 3	95.3	96.1	96.1	96.9	96.1	96.1	95.3	97.7	96.1	96.1	96.1	94.5
Run 4	94.5	96.1	95.3	95.3	95.3	95.3	89.8	94.5	93.0	91.4	92.2	92.2

S02
Run 1	85.2	87.5	90.6	90.6	90.6	90.6	85.2	91.4	90.6	90.6	91.4	91.4
Run 2	78.9	79.7	79.7	78.9	78.9	78.9	80.5	85.2	87.5	85.2	84.4	84.4
Run 3	82.8	85.2	85.2	87.5	86.7	86.7	87.5	90.6	92.2	93.0	92.2	92.2
Run 4	88.3	89.8	89.8	90.6	90.6	90.6	87.5	90.6	88.3	91.4	92.2	93.0

S03
Run 1	80.5	87.5	86.7	88.3	88.3	88.3	80.5	78.1	79.7	78.9	78.9	77.3
Run 2	78.9	82.0	82.0	82.0	82.0	82.0	80.5	77.3	75.8	75.8	75.0	75.0
Run 3	74.2	79.7	82.0	82.8	82.8	82.8	71.9	74.2	78.1	78.9	78.9	78.1
Run 4	82.8	85.9	86.7	87.5	87.5	87.5	83.6	88.3	87.5	85.2	85.2	85.9

S04
Run 1	75. 8	79.7	82.0	82.8	82.0	82.8	85.9	85.9	85.2	85.9	86.7	85.9
Run 2	64.8	68.8	70.3	70.3	71.9	71.9	79.7	80.5	81.3	82.0	82.8	83.6
Run 3	69.5	73.4	73.4	72.7	74.2	75.8	78.9	83.6	84.4	86.7	84.4	84.4
Run 4	68.0	66.4	71.1	70.3	70.3	71.1	83.6	83.6	84.4	85.2	82.8	82.0

S05
Run 1	64.1	68.0	72.7	74.2	74.2	74.2	73.4	79.7	82.0	82.8	84.4	83.6
Run 2	76.6	78.9	79.7	79.7	79.7	79.7	74.2	81.3	82.8	87.5	86.7	87.5
Run 3	61.7	66.4	66.4	67.2	68.0	68.0	63.3	66.4	71.9	72.7	75.0	75.8
Run 4	69.5	75.8	78.1	78.9	78.9	78.9	81.3	77.3	80.5	82.8	82.8	82.0

S06
Run 1	60.9	66.4	66.4	67.2	67.2	68.0	64.1	63.3	64.8	69.5	71.1	72.7
Run 2	64.1	60.9	61.7	61.7	63.3	63.3	63.3	64.1	70.3	71.1	68.8	68.8
Run 3	54.7	59.4	60.9	61.7	60.9	60.9	63.3	63.3	63.3	64.1	64.1	64.1
Run 4	59.4	58.6	61.7	62.5	64.1	65.6	55.5	60.9	64.1	68.0	69.5	71.1

S07
Run 1	52.3	57.8	57.8	57.8	57.0	57.0	51.6	56.3	53.1	54.7	51.6	50.8
Run 2	39.8	42.2	44.5	44.5	43.00	43.8	45.3	51.6	50.8	54.7	57.0	56.3
Run 3	38.3	41.4	40.6	40.6	40.6	40.6	40.6	36.7	41.4	42.2	43.0	43.8
Run 4	43.00	43.8	43.8	45.3	45.3	45.3	48.4	53.9	53.9	57.8	59.4	58.6

S08
Run 1	46.9	50.0	53.1	53.9	53.9	53.9	52.3	57.8	61.7	60.9	61.7	60.2
Run 2	40.6	44.5	47.7	50.8	51.6	51.6	59.4	64.1	67.2	71.9	68.8	68.8
Run 3	46.1	49.2	53.9	53.1	53.9	53.9	50.0	55.5	59.4	60.9	63.3	63.3
Run 4	42.2	43.0	47.7	48.4	48.4	48.4	46.1	53.1	58.6	60.2	57.0	58.6

S09
Run 1	39.1	39.8	42.9	41.4	43.7	43.8	34.4	39.1	39.1	40.6	40.6	39.8
Run 2	35.9	32.0	34.4	35.9	37.5	37.5	40.6	38.3	35.9	39.1	39.8	39.1
Run 3	39.1	38.3	38.3	37.5	35.9	35.9	35.9	38.3	36.7	38.3	40.6	39.8
Run 4	34.4	33.6	34.4	34.4	37.5	36.7	33.6	32.8	36.7	34.4	36.7	37.5

S10
Run 1	30.5	32.8	34.4	35.2	35.2	35.2	39.1	39.8	39.8	39.1	41.4	41.4
Run 2	42.2	46.9	47.7	47.7	47.7	47.7	45.3	50.8	48.4	46.9	47.7	48.4
Run 3	32.0	35.2	35.9	35.9	35.9	35.9	35.9	40.6	41.4	42.2	43.0	43.0
Run 4	35.9	39.8	43.0	43.8	44.5	44.5	39.9	40.6	43.8	44.5	46.9	46.1

Average	61.3	63.8	65.3	65.7	65.9	66.1	64.7	67.4	68.5	69.5	69.8	69.8
Peak	95.3	96.1	96.1	96.9	96.9	96.9	95.3	97.7	96.1	96.1	96.1	96.1

Average Δ	—	2.48	3.92	4.37	4.60	4.76	3.38	6.03	7.14	8.20	8.49	8.4
Peak Δ	—	7.03	8.59	10.2	10.9	10.9	18.8	23.4	26.6	31.3	28.1	28.1