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Behavioral tests of lesion Used to differentiate cochlear/retrocochlear site of lesion. Mostly replaced by OAE and electrophysiological tests. Examples of behavioral tests: ABLB (Alternate binaural loudness balance) SISI (Short increment sensitivity index) Tone decay test ABLB Based on phenomenon of recruitment. In normal hearing ears and hearing loss without recruitment, loudness grows in both ears in the same way. Equal loudness at equal sensation levels. Recruitment: Abnormally rapid growth of loudness in the poorer ear. Seen in cochlear hearing loss. Decruitment: Loudness grows very slowly in the poorer ear. Even very intense sounds may not be very loud. Seen in auditory nerve lesions. Growth of loudness