The review has also revealed how inter-individual variability in callosal fiber structure affects both bottom-up and top-down performance on the dichotic listening task. Consequently, the corpus callosum not only has to be considered as a channel for the automatic exchange of information between the cerebral hemispheres, it rather allows for a dynamic and flexible interaction in supporting both bottom-up and top-down stimulus processing. There are circumstances in which we will hear in all three modalities (i.e., monotic, diotic, and dichotic), and our brains are. For example, an individual's ability to direct attention to either ear is mediated by callosal fibers. Diotic and dichotic listening, vowel recognition, binaural unmasking, localization and lateralization. However, the current review of the available data reveals several aspects that can not be explained by the dichotic listening models. Moreover, the two most influential theoretical models of dichotic listening, the structural and the attentional model, both refer to the functional integrity of the corpus callosum, when explaining the REA. The intelligibility scores are related to the. diotic control condition (in which the same signal is presented to both ears). Although this interpretation is widely accepted, the cerebral hemispheres also interact through the corpus callosum. This paper describes the effect of dichotic listening on speech intelligibility in reverberant sound fields. dichotic task was as a tool to investigate selective attention (Broadbent. The dichotic listening paradigm using verbal stimulus material typically yields a right ear advantage (REA) which indicates the left-hemisphere dominance for speech processing.
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