Cybathlon experiences of the Graz BCI racing team Mirage91 in the brain-computer interface discipline

Table 1 Peak and median accuracies (second 1 to 4) across 4-task combinations, achieved during the screening session

Combination	Peak accuracy (%)	Median (1–4) (%)
Hand-Feet-Subtraction-Rest	75.6 STD +/− 5.0	66.1 STD +/− 8.52
Hand-Feet-Word-Rest	72.2 STD +/− 11.0	63.3 STD +/− 8.92
Hand-Feet-Spatial-Rest	68.4 STD +/− 5.0	56.1 STD +/− 7.5
Hand-Feet-Rotation-Rest	68.9 STD +/− 6.0	56.1 STD +/− 6.9
Hand-Feet-Subtraction-SpatNav	67.8 STD +/− 5.0	60.0 STD +/− 8.76
Hand-Feet-Subtraction-Aud	67.2 STD +/− 7.0	59.4 STD +/− 7.5

All accuracies were estimated via 10 times 5-fold cross-validation (CV). The single accuracies of the CV were used for estimating the standard deviation of the accuracies (STD). The combination Hand-Feet-Subtraction-Rest worked best for the pilot, not only in peak accuracy, but also in median accuracy over the feedback period from second 1 to second 4

ISSN: 1743-0003