Table 2.

Findings of correlation analyses between P300 variables and the interference Stroop-test performance in SCA2 patient and preclinical carriers

Variables	SCA2 patients				Preclinical carriers
	Stroop interference time		Stroop interference errors		Stroop interference time		Stroop interference errors
	r	p	r	p	r	p	r	p
V-Lat Cz	0.50	0.006	0.25	0.209	0.63	0.003	-0.13	0.582
V-Amp Cz	-0.23	0.246	-0.10	0.624	-0.48	0.034	-0.03	0.890
V-Lat Pz	0.51	0.006	0.22	0.259	0.64	0.003	-0.12	0.618
V-Amp Pz	-0.26	0.181	-0.13	0.500	-0.47	0.035	-0.04	0.865
A-Lat Cz	0.56	0.002	0.31	0.108	0.48	0.031	0.22	0.364
A-Amp Cz	-0.38	0.046	-0.20	0.309	-0.48	0.034	-0.05	0.840
A-Lat Pz	0.61	0.001	0.32	0.094	0.19	0.414	-0.05	0.819
A-Amp Pz	-0.42	0.025	-0.22	0.257	-0.17	0.477	0.25	0.284