There is considerable evidence that multiple sclerosis (MS) is
associated with impaired retrospective memory. However, although
preliminary evidence suggests that prospective memory is also affected by
the disorder, the degree and nature of the impairment remains to be
clarified. Twenty participants with MS were compared with 20 matched
controls on Virtual Week, a measure of prospective memory that closely
represents the types of prospective memory tasks that actually occur in
everyday life, and provides an opportunity to investigate the different
sorts of prospective memory failures that occur. The results indicated
that irrespective of the specific prospective memory task demands, MS
participants' performance was significantly impaired relative to
controls. MS deficits could not be attributed to problems with
retrospective memory because MS participants in the present study did not
differ significantly from controls on measures of long- and short-term
memory, and significant impairment was observed on a prospective memory
task, which imposed only minimal demands on retrospective memory. These
results therefore suggest that individuals with MS may experience general
difficulties with prospective memory. The practical and theoretical
implications of these findings are discussed. (JINS, 2007,
13, 410–416.)