| Infant | Uninformed Adult | Informed Adult | |
Demonstration duration (s)* | 16.90 (0.90) | 14.70 (0.82) | 14.45 (0.88) | |
Reach-to-grasp phase |
|
|
| |
| Phase duration (s) | 1.02 (0.03) | 1.01 (0.04) | 0.99 (0.02) |
| Mean wrist velocity (mm/s) | 308.33 (9.26) | 319.18 (12.38) | 309.59 (8.83) |
| Wrist trajectory (mm) | 310.89 (8.03) | 314.27 (11.91) | 301.08 (9.18) |
| Peak height of wrist (mm) | 99.20 (5.74) | 101.31 (9.93) | 90.55 (6.47) |
| Peak grip aperture (mm)* | 86.50 (1.60) | 84.06 (1.60) | 85.61 (1.71) |
Lift-to-place phase |
|
|
| |
| Phase duration (s)* | 1.67 (0.17) | 1.33 (0.14) | 1.30 (0.15) |
| Mean wrist velocity (mm/s)* | 368.33 (30.49) | 412.28 (32.15) | 411.60 (29.78) |
| Wrist trajectory (mm)* | 522.36 (20.73) | 484.13 (26.46) | 471.53 (23.17) |
| Peak height of wrist (mm)* | 287.60 (9.62) | 270.23 (8.31) | 260.05 (8.68) |