Data Supplement

Three tables; one Word document.

Files in this Data Supplement:

• E1 - (E)T-1: Bivariate correlations between demographic and clinical characteristics and task performance for controls and MS-patients (Pearson, 2-tailed for age and disease duration; Spearman's rho, 2-tailed for correlations involving EDSS and Education); (E)T-2: Unadjusted group means (SD) for each measure for each subject group; (E)T-3: Word List Generation scores by age group; Word document.