Date of Award

Spring 2013

Document Type

Dissertation

Degree Name

Doctor of Audiology (AuD)

Department

School of Communication

First Advisor

Sheryl Shoemaker

Abstract

Interhemispheric transfer time (IHTT) is the time it takes for information to be transmitted from one hemisphere to the other. The goal of this study was to determine if differences existed in the IHTT of children 6 to 9 years of age with normal auditory processing abilities by the use of an objective measure (auditory late evoked potentials [ALEPs]), specifically waves P1, N1 and P2. It was hypothesized that there would be no difference in IHTT between the groups due to the age range of participants being tested. The 16 participants were divided into two groups based on age and a 2000 Hz tone burst was presented to the test ear for the quiet condition while competing speech babble was presented to the non-test ear for the noise condition. When observing latency in the noise condition, the left ear shifted to a greater extent than the right ear in both groups; however, the younger group revealed longer latency for P1, N1 and P2. Although IHTT was longer in noise than in quiet, both groups reacted similarly due to the similarity in age of participants tested.

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