Table 2.

Correlational analysis^a

	Sham ERN		tDCS-induced Δ ERN
	R	p	R	p
Illness duration	0.093	0.714	0.256	0.304
SAPS	−0.031	0.902	0.035	0.892
Hallucinations	−0.296	0.233	−0.175	0.488
Bizarre behavior	−0.018	0.944	−0.274	0.271
Delusions	0.157	0.535	−0.804	0.00005*
Positive formal TD	−0.043	0.864	0.078	0.757
SANS	−0.740	0.0004*	−0.174	0.490
Affective flattening	−0.657	0.003*	−0.150	0.552
Alogia	−0.424	0.080	0.074	0.770
Avolition apathy	−0.137	0.589	−0.128	0.612
Anhedonia asociality	−0.495	0.037*	−0.330	0.182
Attention	−0.277	0.265	0.077	0.762
BPRS	−0.288	0.246	−0.214	0.393

^aThe two-tailed Pearson correlation results show the brain-symptom relationships between individual patient ERN learning rates, and clinical symptom scores and illness duration. Learning rate parameters were taken from logarithmic model fits based on ERN amplitude dynamics during learning in the sham, baseline condition (left columns), and the change in ERN amplitude dynamics during learning from sham to anodal conditions (right columns). TD, thought disorder.

*Significant.