Dichotic listening in the clinic: New neuropsychological applications

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Abstract
In the first part of this study, a simple dichotic word listening task was administered to 275 normal control subjects. Normative data demonstrated that age and gender both had significant effects on dichotic listening performance (i.e., females outperformed males, and younger adults did better than older adults). In the second part of this study, clinical observations on three patient populations (status-post closed-head injury, cerebral malaria survivors, and Parkinson Disease) demonstrated significantly poorer dichotic listening performance relative to controls. Overall, the results suggest that, when normative observations are systematically collected, dichotic listening tasks may become useful adjuncts to traditional neuropsychological assessments. Dichotic listening may be particularly useful in demonstrating cerebral dysfunction in a wider variety of neurologically impaired patients than has commonly been assumed.

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