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Table 1 Summary of participants’ individual performances in the wheelchair navigation task

From: Toward brain-computer interface based wheelchair control utilizing tactually-evoked event-related potentials

Participant

Final checkpoint reached

Time needed [min] (b.c. = before canceling)

Accuracy (sensitivity) [%]

Specificity [%]

Average time needed per selection [s]

Average number of sequences per selection [abs]

Collision sensors needed [abs]

Sensors for slowing the wheelchair needed [abs]

1

x

8.8

100.0

100.0

17.7

3.6

-

-

2

x

20.8

90.0

96.7

35.7

7.2

-

-

3

x

21.0

77.8

92.6

25.2

5.1

2

1

4

-

36.0 b.c.

63.3

88.5

38.5

7.8

1

3

5

x

12.8

100.0

100.0

27.3

5.5

-

-

6

-

7.8 b.c.

37.5

79.2

33.5

6.8

1

-

7

x

15.0

94.4

98.2

27.6

5.6

-

-

8

x

14.4

89.5

96.5

25.6

5.2

-

-

9

x

14.3

88.9

96.3

26.6

5.3

1

-

10

x

14.9

90.0

96.7

23.3

4.7

1

1

11

x

14.3

100.0

100.0

30.7

6.2

-

-

12

x

10.3

100.0

100.0

21.4

4.3

-

-

13

x

12.7

94.7

98.2

22.5

4.5

-

-

14

-

22.7 b.c.

75.0

92.8

31.9

6.4

5

-

 

Total: N = 11

Mean: 14.5 (excl. those who canceled)

Mean: 85.8

Mean: 95.4

Mean: 27.7

Mean: 5.6

Total: 11 (N = 6)

Total: 5 (N = 3)