Table 6 Top-ranked features based on dominant hand and device type according to a random forest model without race upsampling
From: Quantifying device type and handedness biases in a remote Parkinson’s disease AI-powered assessment
Right-handed | |||
|---|---|---|---|
Rank | Feature name | Importance | Feature description |
1 | Maximum pixel deviation straight line | 0.04 | Maximum deviation from the centerline when tracing a straight line without regard to the window height (pixels) |
2 | Time to trace a straight line | 0.04 | Amount of time taken to trace a straight line |
3 | Maximum deviation straight line | 0.04 | Maximum deviation from the centerline when tracing a straight line (percentage of screen height) |
4 | Time to trace the sine wave normalized | 0.04 | Amount of time taken to trace the sine wave with respect to the window width |
5 | Total deviation straight line | 0.04 | Total accumulated deviation from the centerline when tracing a straight line (percentage of screen height) |
Left-handed | |||
Rank | Feature name | Importance | Feature description |
1 | Correct the press rate constant key | 0.08 | Ratio of correct key presses to the average response time when prompted with a constant key. |
2 | Average absolute deviation straight line | 0.07 | Average of absolute values of deviation from the centerline when tracing a straight line (percentage of screen height) |
3 | Maximum pixel deviation straight line | 0.05 | Maximum deviation from the centerline when tracing a straight line without regard to the window height (pixels) |
4 | Average response time constant key | 0.05 | Average response time when prompted with a constant key |
5 | Mean deviation straight line | 0.05 | Mean deviation from the centerline when tracing a straight line (fraction of screen height) |
Mac | |||
Rank | Feature name | Importance | Feature description |
1 | Total click time for all tests | 0.06 | Total time taken for clicking the box |
2 | False press ratio random key | 0.05 | Ratio of false key presses to the total number when prompted with a random key |
3 | Maximum pixel deviation straight line | 0.05 | Maximum deviation from the centerline when tracing a straight line without regard to the window height (pixels) |
4 | Average false presses all tests | 0.05 | Average false presses from all tests |
5 | Total click reaction time | 0.04 | Total reaction time for data collected from the click game |
Windows | |||
Rank | Feature name | Importance | Feature description |
1 | Time to trace the sine wave normalized | 0.1 | Amount of time taken to trace the sine wave with respect to the window width |
2 | Time to trace a straight line | 0.06 | Amount of time taken to trace a straight line |
3 | Average points inside all lines | 0.06 | Average number of mouse trace points falling within the line boundaries, regardless of the time taken. |
4 | Time to trace a straight line normalized | 0.05 | Amount of time taken to trace a straight line with respect to the window width |
5 | Time to trace a spiral | 0.05 | Amount of time taken to trace the spiral |
