Inclusion Criteria:  diagnosis MS, Relapsing Remitting (RR) type (MS group) Expanded Disability Status Scale (EDSS) <6 (MS group) Dutch speaking normal or corrected vision feasible use of computer  Exclusion Criteria:  relapse < 3 months (MS group) pregnancy relevant comorbidity (thyroid disease, diabetes, other neurological disorders, metabolic diseases, neuro-endocrine tumor(s) severe cognitive disability