between electrocochleography (ECochG) measures and the subjective scores based on the clinical guidelines provided by the American Academy of Otolaryngology-Head and Neck Surgery Committee on Hearing Equilibrium (AAO-HNS CHE) and the Gibson‟s Score. A total of 250 potential MD patients who have had their MD-related signs and symptoms documented and ECochG testing completed in the Department of Otolaryngology at Christchurch Hospital were included. A selection of details obtained from both the AAO-HNS CHE and ECochG testing results were examined to allow for an investigation on the function of these methods as a diagnostic tool for MD. The inter-method reliability between ECochG and the two subjective methods for the diagnosis of MD was found to be high. In addition, patients that tested “positive”, regardless of the diagnostic method used, showed a higher correlation among the four key symptoms of MD. These results demonstrate that ECochG is an effective diagnostic tool but should not be used as the sole assessment for the diagnosis of MD. This research provides empirical evidence in support of using ECochG as an effective tool as part of the differential diagnosis of MD.