Table 2.
Results of Regression Analyses for Each Kinematic Parameter as a Function of Age and Facial Marker
| Performance Indices | Facial Marker | R2 | B1 | B2 | F | p |
|---|---|---|---|---|---|---|
| 1. 3D movement space (mm3) | EL | .18 | −.04 | 4.80 | .038 | |
| 2. Average speed (mm/s) | EL | .18 | .23 | 5.40 | .030 | |
| UL | .58 | .61 | 34.93 | .010 | ||
| CR | .23 | .56 | 7.51 | .010 | ||
| CL | .66 | .78 | 46.55 | .010 | ||
| LL | .40 | .77 | 16.06 | .001 | ||
| JR | .47 | .82 | 21.29 | .001 | ||
| 3. Path distance (mm) | NS | |||||
| 4. Duration (s) | All | 41 | −.56 | 17.91 | .001 | |
| 5. Coefficient (r) | ER×EL | .27 | 1.67 | 4.07 | .030 | |
| UL×CR | .47 | .08 | 20.53 | .000 | ||
| UL×LL | .23 | .07 | 6.76 | .020 | ||
| CR×CL | .41 | .24 | .01 | 7.53 | .003 | |
| CR×LL | .35 | .07 | 12.53 | .002 | ||
| 6. Abs lag (ms) | CR×LL | .33 | −.01 | 11.42 | .003 | |
| UL×LL | .32 | −.01 | 10.62 | .003 | ||
| 7. Raw lag (ms) | NS |
Note: Only significant fits are displayed. NS indicates that the effect of age was not significant for all regions for that performance index; calculation for duration was based on the motion of all facial regions. ER, right eyebrow; EL, left eyebrow; UL, upper lip; CR, right oral commissure; CL, left oral commissure; LL, lower lip; JR, chin.