. Author manuscript; available in PMC: 2016 Sep 1.

Published in final edited form as: Brain Imaging Behav. 2015 Sep;9(3):619–638. doi: 10.1007/s11682-014-9317-9

Table 2.

Nonparametric correlation analysis (Spearman’s Rho) testing the relations between PD symptom severity, LEDD and Stroop task performance (match condition) in PD patients.

		Stroop-RS	INC-RS	CON-RS
UPDRS-II	Rho	−.89*	.62	−.59
	p	0.0001	0.041	0.056

		Stroop-RR	INC-RR	CON-RR

UPDRS-III	Rho	−.49	−.69	−.07
	p	0.12	0.018	ns
LEDD	Rho	.59	.23	−.75* 0.008
	p	0.058	ns

Abbreviations: Parkinson Disease patients (PD), Unified Parkinson’s Disease Rating Scale (UPDRS), part II (daily living), part III (motor symptoms), levodopa equivalent daily dose (LEDD), Reaction time (RT), cue-target color match (M), incongruent (INC), congruent (CON), Stroop=INC-CON, response switching (RS), response repetition (RR).