Neuropsychological performance.

All values represent mean (SD). Between-groups comparisons have been
investigating using univariate analysis of variance for each
variable, with age, disease duration and Led as covariates and group
membership (apathy vs. No apathy) as fixed factor (ANCOVA). The
η2 statistic was used to estimate the effect
size. P <0.05, FDR corrected.
D-KEFS = Delis-Kaplan Executive Function
system; CVLT-II = California Verbal Learning
Test –II; WCST-64 =  Wisconsin Card
Sorting Test-64 cards version; SS = Spatial
Span; DS =  Digit Span;
DSy =  Digit symbol.