Research Article
Identification of Cognitive Distraction Using Physiological Features for Adaptive Driving Safety Supporting System
Table 4
Comparing the detection capability with various combinations of individual features using AdaBoost.
| Selected features | Cognitive load | Average accuracy | ā value |
| Gaze | Conversation | 67.6 | 68.8 | Arithmetic | 66.7 | 67.7 | Both | 72.8 | 80.5 |
| Head | Conversation | 84.5 | 86.2 | Arithmetic | 78.3 | 81.2 | Both | 84.0 | 89.0 |
| Pupil | Conversation | 85.0 | 84.2 | Arithmetic | 86.2 | 86.5 | Both | 87.0 | 90.0 |
| RRI | Conversation | 72.3 | 71.4 | Arithmetic | 77.3 | 75.3 | Both | 78.3 | 84.3 |
| Gaze + head | Conversation | 86.1 | 87.4 | Arithmetic | 81.6 | Both | 85.8 | 89.9 |
| Gaze + pupil | Conversation | 86.0 | 86.3 | Arithmetic | 84.5 | 84.6 | Both | 86.8 | 90.2 |
| Gaze + RRI | Conversation | 76.1 | 77.6 | Arithmetic | 79.1 | 78.5 | Both | 79.0 | 84.3 |
| Head + pupil | Conversation | 89.7 | 90.8 | Arithmetic | 87.1 | 88.7 | Both | 89.7 | 92.6 |
| Head + RRI | Conversation | 87.8 | 89.6 | Arithmetic | 87.6 | 88.4 | Both | 89.6 | 92.9 |
| Pupil + RRI | Conversation | 89.7 | 90.0 | Arithmetic | 88.1 | 87.6 | Both | 90.2 | 92.8 |
| Gaze + head + pupil | Conversation | 89.4 | 90.6 | Arithmetic | 89.8 | Both | 90.2 | 93.0 |
| Gaze + head + RRI | Conversation | 88.3 | 90.0 | Arithmetic | 89.3 | Both | 90.3 | 93.3 |
| Gaze + pupil + RRI | Conversation | 89.9 | 90.1 | Arithmetic | 89.0 | 89.4 | Both | 91.1 | 93.5 |
| Head + pupil + RRI | Conversation | 90.6 | 92.0 | Arithmetic | 89.8 | 91.2 | Both | 92.5 | 94.7 |
| Gaze + head + pupil + RRI | Conversation | 91.0 | 92.3 | Arithmetic | 92.0 | 93.1 | Both | 92.9 | 95.1 |
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