Project: Research project

Project Details


DESCRIPTION(adapted from applicant's abstract): The broad objective of the
proposed research is to provide a more detailed understanding of pre-attentive
processes that contribute to auditory perception. We will use high temporal
resolution of event-related potentials in conjunction with behavioral methods
to compare the outcome of pre-attentive auditory processes with the perception
resulting from attentive processing of the same sounds, across various
experimental conditions. This will allow us to evaluate the processing stages
between sensory input and behavioral response. There are three main aims of the
proposal. One is to determine the extent of processing of unattended acoustic
information. Four experiments address this aim. One tests the pre-attentive
processing capacity. Another determines whether the process of auditory feature
integration is entirely pre-attentive. A third tests the hypothesis that the
auditory system organizes information from multiple unattended sources when
attention is directed to a single acoustic source. The fourth investigates
stimulus context effect on auditory event formation. A second aim is to
understand how attention and pre-attentive processes interact. Two experiments
address this aim, one investigates how perception relates to pre-attentive
auditory event formation and another characterizes the way in which
pre-attentive auditory events can affect behavioral performance. The third aim
is to provide further evidence for attentional modulation of early auditory
processes. One experiment will test the hypothesis that top-down processing can
modify pre-attentive grouping processes. Deficits in central auditory
processing are to be key in many cognitive disorders. Using
electrophysiological measures, in conjunction with behavioral methods, to
delineate the pre-attentive processes that contribute to auditory perception
can help advance our understanding of impaired processing, which is essential
for developing rehabilitative treatments. Furthermore, because subject response
is not needed for measuring the ERP components, this methodology has the
potential to be an important noninvasive tool for diagnosis of central auditory
processing deficits that contribute to impaired cognition.
Effective start/end date9/28/008/31/18


  • Speech and Hearing
  • Medicine(all)
  • Neuroscience(all)


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