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Table 4 Patients’ online results

From: The challenge of controlling an auditory BCI in the case of severe motor disability

 

Calibration (S):

cross-validation results

Tests

 

1st

2nd

Spatial filters

Blocks

LIS1

Chance level (n = 14)

Chance level (n = 14)

NA

NA

LIS2

Chance level (n = 14)

Chance level (n = 14)

NA

NA

LIS3

Chance level (n = 7)

70% (n = 14)

3

Chance level (n = 20)

ALS1

93% (n = 14)

NA

1

Chance level (n = 30)

ALS2

Chance level (n = 14)

Chance level (n = 14)

1

Chance level (n = 20)

ALS3*

100% (n = 14)

NA

1

100% (30/30)

ALS4*

100% (n = 14)

NA

1

100% (30/30)

  1. *Concerning this patient, after the 10th block, we obtained online feedback answers at chance level. We realized in our subsequent, offline analysis, that after the 10th block, despite a correct functioning of the classifier, the online feedbacks were not based on the real electrophysiological signals anymore. Note that this lack of correct feedback didn’t impaired the performance, as both of these patients obtained an accuracy of 100% on 30 blocks
  2. n  number of blocks
  3. NA not available