Table 2. Descriptive statistics (mean and SD) of digit 1-back and DCCS

		Mean (SD)	Mean (SD)
DCCS		RT	Accuracy
Gyeongsang	Female	0.103 (0.204)	9.727 (1.902)
	Male	0.099 (0.179)	8.428 (1.718)
Seoul	Female	0.151 (0.188)	9.384 (1.445)
	Male	0.031 (0.296)	8.800 (2.201)

Digit 1-back		RT	Accuracy
Gyeongsang	Female	0.021 (0.127)	6.363 (2.419)
	Male	0.053 (0.180)	6.285 (3.251)
Seoul	Female	–0.007 (0.089)	6.461 (2.503)
	Male	0.063 (0.173)	5.700 (2.584)