Research Article
Age-Related Evolution Patterns in Online Handwriting
Table 2
Main characteristics of first-layer clusters.
| ā | Dynamics | Inclination | Pressure | Curvature | Pen-up |
| Cluster 1 | Low speed, accel, jerk | Straight | Average | Round strokes | Average | Cluster 2 | Very low speed, accel, jerk | Straight | Low | Round strokes | Many | Cluster 3 | High speed, accel, jerk | Inclined right | Average | Straight strokes | Very few | Cluster 4 | Average speed, accel, jerk | Inclined right | High | Straight strokes | Average | Cluster 5 | Average speed, accel, jerk | Straight | Average | Average | Many | Cluster 6 | Average dyn. on , low dyn. on | Straight | Average | Average | Average | Cluster 7 | Average speed, accel, jerk | Straight | Average | Round strokes | Average | Cluster 8 | High dyn. on ,ā average dyn. on | Straight | Average | Straight strokes | Few | Cluster 9 | Very high speed, accel, jerk | Inclined right | Average | Straight strokes | Average |
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