TABLE 2.

Correlation coefficients for the linear and non-linear relationships between age and pen movement stroke parameter for all subjects (n=42), male only (n=24), and female only (n=18) writers.

		Linear	Log(n)
Stroke Duration	All	0.42 †	0.41†
	Males	0.46 †	0.45†
	Females	0.36	0.35
Stroke Amplitude	All	−0.42†	−0.44†
	Males	−0.59 †	−0.61†
	Females	−0.20	−0.20
Stroke Velocity	All	−0.43†	−0.44†
	Males	−0.60‡	−0.66‡
	Females	−0.19	−0.19
Relative Time to Peak Velocity	All	−0.26	−0.25
	Males	−0.48*	−0.45*
	Females	−0.25	0.10
Average Normalized Jerk	All	0.39*	0.37*
	Males	0.42*	0.40
	Females	0.44	0.42
No. Acc. Peaks/Stroke	All	0.44†	0.42
	Males	0.52†	0.50*
	Females	0.26	0.26
Pen Pressure	All	−0.37*	−0.36*
	Males	−0.33	−0.32
	Females	−0.40	−0.40

^*p<0.05;

^†p<0.01;

^‡p<0.001