Abstract
Motivation and the presence of mild traumatic brain injury (MTBI) were crossed to determine whether individuals with MTBI could overcome attention deficits many years after injury. Contrary to prediction, university students with self-reported MTBI (average time since injury = 6.4 years) performed no differently from controls on a short but demanding set of neurocognitive tasks. As predicted, however, motivation differentially affected these groups by elevating controls’ performance while leaving the MTBI group’s performance unaffected. This finding was mainly due to individuals with more than one MTBI. These results suggest that university students who have sustained more than one MTBI may demonstrate subtle, long-term neurocognitive impairment. Additionally, motivation may be an important variable to consider in MTBI research.
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