Table 1. Laterality indices of fine motor performance in different age groups.

EXPERIMENT 1						Pearson-Correlation with age
Task:	Parameter:	Group 25	Group 50	Group 70	Group 80	r	p	Fisher-Z
Aiming	Number of errors	0.38±0.19	0.16±0.14	0.08±0.14	0.41±0.16	−0.065	0.621	−0.065
	Total time	0.07±0.02	0.00±0.02	−0.01±0.02	0.01±0.02	−0.286	0.027*	−0.295
Steadiness	Number of errors	0.33±0.12	0.23±0.15	−0.01±0.09	−0.08±0.11	−0.317	0.014*	−0.328
Line tracing	Number of errors	0.18±0.05	0.11±0.05	0.09±0.04	−0.01±0.05	−0.313	0.015*	−0.324
	Total time	−0.02±0.02	−0.02±0.03	−0.09±0.03	−0.14±0.06	−0.324	0.012*	−0.336
Tapping	Number of hits	−0.07±0.01	−0.07±0.01	−0.07±0.01	−0.08±0.02	0.001	0.991	0.001

Average laterality indices (±SEM) for all parameters obtained for the aiming, steadiness, line tracing, and tapping tasks for the four age groups tested. Individual data (n = 60) were used to calculate the linear (Pearson) correlation coefficients between laterality indices and age for each parameter. Significance levels are given for p<0.05 (*). To obtain comparability of linear (Pearson) correlation coefficients, Fisher-Z values are given after Fisher-transformation.