Table 4.

Correlations between measures of white matter integrity and neurocognitive functioning

	Fractional Anisotropy						Radial Diffusivity
	Left Frontal	Right Frontal	Left Temporal	Right Temporal	Left Parietal	Right Parietal	Left Frontal	Right Frontal	Left Temporal	Right Temporal	Left Parietal	Right Parietal
Intelligence
Full scale	0.52	0.51	0.59a	0.48	0.51	0.44	−0.39	−0.36	−0.42	−0.35	−0.36	−0.24
Verbal	0.42	0.40	0.50	0.44	0.44	0.42	−0.40	−0.37	−0.44	−0.39	−0.36	−0.27
Perceptual	0.48	0.49	0.54a	0.44	0.48	0.43	−0.30	−0.29	−0.31	−0.27	−0.28	−0.18
Academics
Word reading	0.35	0.37	0.46	0.45	0.42	0.49	−0.44	−0.42	−0.46	−0.43	−0.41	−0.34
Calculations	0.34	0.40	0.47	0.54a	0.36	0.52a	−0.48	−0.46	−0.52	−0.49	−0.45	−0.39
Attention
Focus	0.28	0.31	0.43	0.41	0.26	0.34	−0.41	−0.39	−0.44	−0.40	−0.37	−0.30
Sustain	−0.15	−0.12	−0.09	0.03	−0.13	−0.17	−0.36	−0.34	−0.42	−0.36	−0.29	−0.32
Memory
New learning	0.37	0.31	0.27	0.23	0.33	0.35	−0.25	−0.22	−0.22	−0.22	−0.24	−0.19
Short-term	0.41	0.38	0.25	0.24	0.39	0.40	−0.02	−0.01	0.06	0.03	−0.01	0.03
Long-term	0.00	0.03	−0.09	0.11	0.08	0.35	−0.07	−0.11	0.03	−0.10	−0.11	−0.13
Span	0.52	0.45	0.53	0.28	0.66a	0.34	−0.26	−0.17	−0.31	−0.18	−0.25	−0.10
Visual	0.50	0.59a	0.57a	0.66a	0.58	0.78b	−0.19	−0.15	−0.17	−0.02	−0.19	0.13
Processing speed
Information	0.52	0.53	0.68a	0.56a	0.53	0.49	−0.29	−0.25	−0.35	−0.27	−0.26	−0.16
Visual-motor	0.44	0.47	0.61a	0.57a	0.47	0.45	−0.28	−0.26	−0.34	−0.27	−0.24	−0.16
Motor	0.36	0.41	0.54a	0.52	0.35	0.32	−0.30	−0.30	−0.34	−0.30	−0.25	−0.19
Executive function
Fluency	0.46	0.44	0.65a	0.58a	0.51	0.44	−0.44	−0.39	−0.53a	−0.44	−0.38	−0.28
Working memory	0.31	0.27	0.38	0.35	0.54a	0.52a	−0.22	−0.23	−0.23	−0.27	−0.24	−0.19
Interference control	−0.24	−0.42	−0.21	−0.36	−0.09	−0.19	−0.28	−0.28	−0.27	−0.25	−0.30	−0.26
Flexibility	0.23	0.24	0.17	0.19	0.29	0.22	−0.56a	−0.54a	−0.56a	−0.52a	−0.51	−0.44
Shifting	0.26	0.29	0.46	0.51	0.34	0.44	−0.67b	−0.64a	−0.69b	−0.63a	−0.63a	−0.55a
Planning and organization	0.34	0.39	0.25	0.46	0.36	0.46	−0.32	−0.31	−0.27	−0.27	−0.28	−0.25
Behavior rating
Inhibition	0.10	0.22	0.06	0.34	0.10	0.35	0.33	0.29	0.39	0.32	0.36	0.27
Shift	0.35	0.46	0.28	0.15	0.13	0.28	0.41	0.37	0.34	0.30	0.47	0.38
Emotional control	0.23	0.21	0.15	0.25	0.19	0.26	0.21	0.21	0.26	0.27	0.27	0.18
Self-monitor	0.29	0.38	0.21	0.48	0.16	0.40	0.33	0.30	0.33	0.25	0.40	0.30
Cognitive rating
Initiation	0.24	0.31	0.24	0.53	0.17	0.37	0.17	0.13	0.10	0.08	0.27	0.15
Working memory	0.42	0.48	0.36	0.56	0.27	0.27	0.19	0.18	0.15	0.19	0.27	0.24
Planning	0.21	0.30	0.20	0.50	0.23	0.47	0.18	0.14	0.17	0.10	0.22	0.14
Task completion	0.29	0.28	0.15	0.35	0.16	0.24	0.37	0.35	0.40	0.31	0.41	0.34
Organization	0.39	0.48	0.25	0.43	0.17	0.33	0.30	0.27	0.32	0.26	0.34	0.32

^a P ≤ .01.

^b P ≤ .001.