Hearing sensitivity varies according to the frequency of sounds. To take this into account, hearing sensitivity can be measured for a range of frequencies and plotted on an audiogram. Other method for quantifying hearing loss is a hearing test using a mobile application or hearing aid application, which includes a hearing test. Hearing diagnosis using mobile application is similar to the audiometry procedure. Audiograms, obtained using mobile applications, can be used to adjust hearing aid applications. Another method for quantifying hearing loss is a speech-in-noise test. which gives an indication of how well one can understand speech in a noisy environment. Otoacoustic emissions test is an objective hearing test that may be administered to toddlers and children too young to cooperate in a conventional hearing test. Auditory brainstem response testing is an electrophysiological test used to test for hearing deficits caused by pathology within the ear, the cochlear nerve and also within the brainstem. A case history (usually a written form, with questionnaire) can provide valuable information about the context of the hearing loss, and indicate what kind of diagnostic procedures to employ. Examinations include otoscopy, tympanometry, and differential testing with the Weber, Rinne, Bing and Schwabach tests. In case of infection or inflammation, blood or other body fluids may be submitted for laboratory analysis. MRI and CT scans can be useful to identify the pathology of many causes of hearing loss. Hearing loss is categorized by severity, type, and configuration.
To meet diagnosis there must be a clinically significant personality disturbance that represents a change from the individual’s previous characteristic personality pattern. This personality disturbance must be explainable directly as a result from a pathophysiological health condition affecting the brain. The duration, onset, and remission of the health condition, along with responses to treatment of the underlying health condition, must be consistent with presentations of the personality disturbance. There are seven sub-classifications of secondary personality change based on disturbances of affect, which includes "constricted", "blunted", "flat", "labile" and "inappropriate", along with other specified and unspecified categories. ICD-10
In the ICD-10 there were no specifically listed diagnostic criteria. It is characterized by "a significant alteration of the habitual patterns of behaviour displayed by the subject premorbidly, involving the expression of emotions, needs and impulses." Cognition, thought functions and sexuality are mentioned as potentially altered or affected. Two "organic" and three "syndrome" underlying causes are mentioned respectively: "pseudopsychopathic personality", "pseudoretarded personality", "frontal lobe damage", "limbic epilepsy personality" and post-lobotomy. Differential diagnosis
Being an organic disorder, differential diagnosis between mental disorders and OPD is necessary. According to the ICD-11, specific considerations for differential diagnosis include delerium, dementia, personality disorders, impulse control disorder, and addictive behavior syndrome. For differential diagnosis in the ICD-10, along with personality disorders, there are two mentioned conditions in the in the ICD-10 under the same diagnostic category "F07" for consideration: postencephalitic parkinsonism (called "postencephalitic syndrome" in the ICD-10) and post-concussion syndrome. Patients with OPD may present similar symptoms to Huntingtons disease.