The Dichotic Difference Score (DDS)

By: Frank Musiek The dichotic difference score (DDS) has been utilized periodically over the history of dichotic listening. It represents an interesting manipulation of dichotics and relates to its various applications. The DDS simply requires the computation of the differences on performance of dichotic listening between the right and left ears. Generally, this means that…

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Diagnosis and Treatment of Amblyaudia, a type of Auditory Processing Disorder

[A preview of a the presentation at Pathways for AAA by Deborah Moncrief] Amblyaudia is a deficit in binaural integration, a process that begins with excitatory and inhibitory activation in the medial and lateral superior olivary complexes of the auditory brainstem (Tollin, 2003).  Interaural timing and intensity differences are used to detect coincident signals and…

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The Contralateral Ear Effect on Tests of Central Auditory Function: An Introduction

Frank Musiek     Introduction   Back in the 1950’s Ettore Bocca and his Italian colleagues (Bocca, Calearo, Cassinari, 1954) were the first to develop and make significant clinical use of central auditory tests. They had learned that the pure tone audiogram was not useful in reflecting deficits of the central auditory nervous system (CANS).…

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Sound Localization in Split-brain Subjects

Renata Filippini, PhD. Post-doctoral researcher at the University of Arizona and University of Sao Paulo   The construction of an accurate spatial map is key for localization of sound sources not only for communication, but also for survival. Being able to figure out the characteristics of the environment allow us to interact with it in a…

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