This study will be a randomized open-label clinical pilot trial to compare a plasticity-based and adaptive cognitive remediation (PACR) program to an active control (ordinary computer games) in 20 adults with multiple sclerosis (MS) starting Gilenya therapy. Primary outcome measures will be used as preliminary indicators of effect, with improvements on program task-related measures and changes in cognitive measures. Secondary outcome measures will determine the feasibility of the use of these programs in patients with MS, as indicated by compliance and patient-reported experience.