Preliminary validation of the CDR System indicated that for most, but not all measures psychometric properties were adequate and the measures were related to disability (EDSS and MSFC) and other measures of cognition.
Edgar, C., Jongen, P. J., Sanders, E., Sindic, C., Goffette, S., Dupuis, M., Jacquerye, P., Guillaume, D., Reznik, R., & Wesnes, K. (2011). Cognitive performance in relapsing remitting multiple sclerosis: a longitudinal study in daily practice using a brief computerized cognitive battery. BMC Neurology, 11, 68. https://doi.org/10.1186/1471-2377-11-68 (Original work published 2011)