Table 3. Pearson's correlations of CC volumes with selected neurocognitive measures in children with 22q11DS (n=59, trails B time data available only for 25 subjects).

CC region	Verbal comprehension	Working memory	Trails B time	WCST perseverative errors	WIAT math score
Genu	0.20	0.17	−0.46*	0.11	0.09
Posterior Genu	0.24	0.06	−0.32	0.13	0.10
Truncus	0.21	0.01	−0.34	0.10	0.07
Anterior Splenium	0.21	0.10	−0.27	0.24	0.03
Splenium	0.35**	0.30*	−0.46*	0.36**	0.28*
Total CC	0.33*	0.28*	−0.50*	0.26*	0.17

Negative correlation with trails B time indicated that increased CC volumes were associated with a shorter time required to complete the task, so if effect these are positive correlations with set-shifting.

Magnitude of correlation: 0.1=small, 0.3=medium and 0.5=large. Medium and large effect sizes are in bold.

^*P<0.05.

^**P<0.01.