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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)