Table 2.

Mean Scores (± SD) for Key Study Measures.

Variable	SCD (n = 32)	Non-SCD (n = 85)	Statistic t(115)
EXAMINER Working Memory Composite (raw score)	−.68 ± .55	−.14 ± .66	4.86**
Dot Counting (# correct)	10.91 ± 3.59	13.36 ± 4.70	2.68**
N-back (d-prime)	1.08 ± 1.79	1.79 ± 0.75	4.70**
Examiner Cognitive Control Composite (raw score)	.73 ± .70	−.09 ± .85	−4.79**
Flanker Test (total score)	6.99 ± 1.17	8.24 ± 1.28	4.82**
Dysexecutive Errors (total)	12.50 ± 6.76	9.80 ± 6.53	−1.97
Antisaccade Test (total score)	24.78 ± 8.95	27.69 ± 4.52	2.32*
Set Shifting Task (total score)	5.64 ± 0.95	6.76 ± 1.22	4.73**
EXAMINER Processing Speed	1.07 ± 0.24	0.83 ± 0.25	−4.73**

Note.

^*p < .05;

^**p < .01. For the Cognitive Control Composite, Dysexecutive Errors, and Processing Speed scores higher scores represent poorer performance. Mean response time for EXAMINER processing speed is calculated in seconds.