Table 1.

Mean, standard deviation, and range for in-scanner and behavioral measures. Behavioral measures are expressed as standard scores. Accuracy rates reflect overall accuracy, including both errors of omission and commission.

		Mean	Std Dev.	Range
In-scanner detection tasks
Accuracy (%)
	Digit present	92.93	8.94	69.44-100
	Digit absent	92.42	11.16	53.70-100
	Letter present	92.40	11.53	49.38-100
	Letter absent	93.81	10.05	55.56-100
Response time (ms)
	Digit present	746	82	630-937
	Digit absent	771	91	666-994
	Letter present	766	104	638-1079
	Letter absent	782	97	641-986
Standardized measures
	Math fluency	114	14.36	87-149
	Calculation	120	11.58	98-146
	Calculation skills	121	12.56	93-145
	Letter-Word ID	112	6.27	97-122