Table I.

Demographic information and task performance across OTCD and control groups

	OTCD group	Control group
Age	33.2 ± 2.7 y	31.8 ± 2.7 y
Gender	3 M, 16 F	7 M, 14 F
Handedness	16 R, 3 L	17 R, 4 L
IQ	111 ± 2.1**	122 ± 2.7
Digit Span Score	10.4 ± 0.6*	13.2 ± 0.6
Stroop Test Reaction Time (Incongruent Trials)	1089 ± 34**	874 ± 42
CTMT Composite Score	40.68 ± 1.67**	50.25 ± 1.77
1‐back Acc.	0.992 ± 0.0050	0.991 ± 0.0027
1‐back RT	500 ± 24 ms	501 ± 23 ms
2‐back Acc.	0.972 ± 0.0074	0.974 ± 0.0063
2‐back RT	528 ± 21 ms	540 ± 24 ms

The groups are well matched and only differ on full‐scale IQ (P = 0.001). Variance reflects ± 1 standard deviation. Digit span data were only available for six OTCD subjects.

^* P < 0.05,

^** P < 0.01.