Different studies have highlighted the specific deficiency concerning emotions recognition in multiple sclerosis. Patients with multiple sclerosis are reported to have more difficulty recognising negative emotions, especially anger and fear.~In this context, RECODE study has a twofold objective:~To determine whether the positive emotions recognition remains preserved by combining behavioural and neurophysiological measures (electrodermal activity).~To study this disorder's etiology through a comparison between a multiple sclerosis patient group and a control group (matched in sex, age, and education's level).
Through this study, a group composed of multiple sclerosis patients will be compared to a healthy volunteers group to determine if the positive emotions recognitions is preserved in the first group.