Two new questionnaires were devised to investigate dimensions of complaint about tinnitus. Following a factor analysis of data provided by a sample of tinnitus patients who were administered the first questionnaire, the second questionnaire was developed. This included questions concerning coping attitudes and beliefs about tinnitus. The results of the two analyses were similar and they indicated the presence of three main dimensions of complaint (emotional distress, auditory perceptual difficulties, and sleep disturbance). However several smaller factors suggested that complaint was more complex than originally predicted. The second questionnaire successfully discriminated complaining from non-complaining patients.

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This study assesses the prevalence of psychological disturbance among a consecutive series of 120 neuro-otology outpatients, using a structured interview conducted by a clinical psychologist. 42% of all patients were found to be in need of, and were offered, psychological help (27% of those with hearing loss, 45% of those with tinnitus and 64% of those with dizziness). 86% of those offered psychological help accepted it. Current psychological distress was associated with the number of symptoms complained of and past psychiatric history. Patients completed the General Health Questionnaire which was found to have a sensitivity rate of 82% and a specificity rate of 87% in this setting. Physicians were also asked to rate patients' psychological state; close agreement was found between these ratings and those of a psychologist. The contribution of psychological assessment of neuro-otology patients is discussed.

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Contralateral acoustic stimulation has the effect of reducing the amplitude and shifting the phase of click-evoked OAEs. This effect is thought to be mediated via the medial efferent system and, therefore, the presence of this effect could be used to test the integrity of the neural pathway from one cochlea to the other. With a clinical application in mind, a technique for demonstrating the influence of contralateral acoustic stimulation on click-evoked OAEs was designed to overcome fluctuations in patient and environmental noise. The results of this test on three normal subjects and a patient with a posterior fossa lesion are described.

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Questions are raised about the technical and psychological interpretation of loudness match measures in the assessment of tinnitus "intensity". The effect of hearing threshold on loudness matches expressed in sensation level (SL) was investigated by selecting subjects with different degrees of hearing loss. The loudness match expressed in SL was found to be a function of threshold. Correlations were then determined between psychological scales of tinnitus complaint (reported loudness, distress, intrusiveness, and others) and loudness match expressed in HL, SL, sones, or personal loudness units (PLUs). Only matches expressed in PLUs were significantly correlated with reported loudness or other psychological scales. The PLU transformation, derived from an individually determined loudness function, produces values that are generally independent of other audiometric measures. It is therefore recommended for assessing tinnitus "intensity".

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