Table 2.

Correlations Between Pegboard Performance and Hand-Region Tract-Specific Measurements for the Control Group (Controlling for Age and Center)

Pegboard	Diffusion Tensor Measures of Hand-Region Frontoparietal U Tract
	Left Hemisphere			Right Hemisphere
	Fractional	Perpendicular	Mean	Fractional	Perpendicular	Mean
	Anisotropy	Diffusivity	Diffusivity	Anisotropy	Diffusivity	Diffusivity
Right	.074	−.213	−.305a	−.140	.030	−.008
Left	.352b	−.376b	−.315a	−.057	.049	.077
Both	.199	−.157	−.051	.169	−.192	−.212
R + L + Both	.244	−.316a	−.287a	.021	−.095	−.116
Assembly	.183	−.157	−.090	.002	.005	.009

Values are Pearson’s r.

R + L + Both, right hand + left hand + both composite score.

^ap < .025.

^bp < .01.