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Table 1 Performance metrics for the eyebrow switch.

From: The design and testing of a novel mechanomyogram-driven switch controlled by small eyebrow movements

Participant

Contraction detection

Attempt rating

Effort rating

Slope of response time

 

Sensitivity

Specificity

  

95% CI of slope (ms/min)

B1

1.000

1.000

1

2

-10.25

-1.75

A1

1.000

1.000

1

2

-4.17

-0.31

A2

1.000

1.000

1

2

-9.71

-0.11

A3

1.000

1.000

1

2

-0.15

6.77

A4

1.000

0.997

2

2

-4.19

4.92

A5

0.990

1.000

2

2

-1.59

2.55

A6

1.000

1.000

2

3

-5.83

3.57

A7

1.000

1.000

2

1

-4.36

5.35

A8

0.990

1.000

1

2

-14.64

-5.84

A9

0.990

0.997

2

3

-2.33

9.54

A10

1.000

1.000

1

2

5.84

11.69

Average

0.997 ± 0.004

0.999 ± 0.001

1.45 ± 0.5

2.1 ± 0.5

-4.67 ± 5.5

3.30 ± 5.1

  1. Multiple attempt rating: Did you have to try more than once before activating the switch? [1-Never; 2- Very infrequently; 3- Sometimes; 4- Very often; 5- Almost all the time]
  2. Effort rating: How much effort was required to activate the switch? [1-Nothing at all, not tired; 2- A little, not tired; 3- Moderate, a little tired; 4- A lot, tired; 5-Too much, very tired]
  3. CI -confidence interval; Slope units: response time (ms)/elapsed experiment time (min)