Using eye-tracking technology as a measure of cognition in traumatic brain injury: A scoping review
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Cognitive impairment is a common and debilitating symptom of mild traumatic brain injury (mTBI). Conventional neuropsychological assessment tools rely on verbal or manual responses, and there is no universally accepted protocol. Current methods are sensitive to extraneous factors such as stress, intelligence, and motivation, suggesting the need for more objective tools. A scoping review was undertaken to explore the utility of eye-tracking methods for detecting cognitive impairment in mTBI patients, and to survey the kinds of tasks used in this context. Six academic databases were searched for studies related to brain injury, eye tracking, and cognition. Data from 19 articles were extracted and synthesized. In most cases, neuropsychological and eye-tracking methods were in accordance when detecting cognitive impairment. In many cases, eye tracking measures detected impairments when neuropsychological tasks did not. This review suggests that eye tracking could provide an effective, objective method to measure cognitive impairment in mTBI.