Table 4.

Correlation between n-back difficulty level, OSPAN score, behavioral data and neurological data (Pearson's correlation coefficient).

Variables	N-back	OSPAN	Behavioral						Neurological
			n-back Hit	n-back FA	Flanker hit	Flanker FA	n-back RT	Flanker RT	P300	UA
N-back	1	0	−0.686***	0.728***	−0.359	0.018	0.368*	0.200	−0.324	−0.062
OSPAN		1	0.373*	0.106	0.196	0.251	0.032	−0.372*	−0.387*	0.083
n-back hit			1	0.324	0.324	−0.005	−0.287	−0.286	0.239	−0.034
n-back FA				1	−0.396*	0.094	0.154	0.203	−0.252	−0.059
Flanker hit					1	0.165	−0.217	−0.434*	0.013	−0.063
Flanker FA						1	−0.254	−0.529*	0.081	−0.137
n-back RT							1	0.464*	−0.037	−0.012
Flanker RT								1	0.157	0.186
P300									1	0.348
UA										1

Correlation is significant at the level

^***p < 0.005, ^**p < 0.05,

^*p < 0.01 (2-tailed). Pearson's correlation was used, and sample size is (n = 19).