Table 2. The results of the multiple regression interaction analyses (age, strength and age x strength) for each dexterity task.

Independent Variables	Parameter B	SE	Standardised β	Model R2	sr2 (unique)
Steadiness
Intercept	4.39	0.63
Age	0.14 ***	0.03	.38		0.10
Strength	-0.12 *	0.05	-.20		0.03
Age X Strength	-0.01 *	0.00	-.22	0.35 ***	0.04
Line Tracking
Intercept	14.80	0.87
Age	0.25 ***	0.05	.49		0.18
Strength	-0.14 *	0.07	-.17		0.02
Age X Strength	-0.01	0.00	-.11	0.40 ***	0.00
Aiming
Intercept	35.86	0.42
Age	-0.07 **	0.02	-.27		0.05
Strength	0.19 ***	0.03	.47		0.18
Age X Strength	0.00	0.00	-.03	0.39 ***	0.00
Tapping
Intercept	63.25	0.69
Age	-0.12 **	0.04	-.28		0.06
Strength	0.34 ***	0.06	.49		0.19
Age X Strength	0.00	0.00	.06	0.46 ***	0.00

* p < 0.05;

**p < 0.01;

***p < 0.001.