Investigating the Physiological, Cognitive, and Psychological Effects of a Cognitive-Based Intervention

The primary purpose of this study is to investigate the effectiveness of a brief mindfulness-based intervention for targeting chronic physiological underarousal and post-concussive symptoms following a mild head injury (MHI), as self-reported by undergraduate university students. For the purposes of this study, MHI is defined (and identified) through our demographic questionnaire as a traumatic-based injury to the head - \"Have you ever hit your head with a force sufficient to alter your state of consciousness\" (consistent with the Kay et al., 1993 criteria/definition; American Congress of Rehabilitation Medicine - ACRM). The investigators exclude congenital or genetic injuries.