<prompt> Following are the laboratory tests for the diagnosis of vestibular dysfunction exceptElectronystagmographyOptokinetic testGalvanic testGelles test  <response>: Gelle;s test compares the intensity of bone-conducted tuning fork sound without and with raising pressure on the tympanic membrane with Siegel;s speculum. It;s a test of bone conduction and examines the effect of increased air pressure in ear canal on the hearing. Ref: Diseases of EAR, NOSE and THROAT by PL DHINGRA; 6TH Edition; Page no 22,447 