Table 3. Descriptive statistics for cognitive measures.

Variable	Control		CNP		a P-value
	M	SD	M	SD
Verbal working memory: Duration (ms)	181832	24337.16	185378.59	37274.69	0.726
Verbal working memory: Correct responses	28.67	4.18	27.65	3.30	0.417
Attention: Speed (ms)	2.45	0.05	2.46	0.04	0.426
Attention: Errors	0.81	1.33	0.82	1.24	0.974
Working memory: Speed (ms)	2.86	0.08	2.85	0.10	0.771
Working memory: Errors	2.52	1.99	3.06	2.08	0.424

Note: ms = milliseconds,

^a p-values were calculated using an independent t-test.