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Document Type

Thesis

Date of this Version

8-1968

Citation

Thesis (M.A.)—University of Nebraska—Lincoln, 1968. Department of Speech and Dramatic Art.

Comments

Copyright 1968, the author. Used by permission.

Abstract

It was the purpose of this study to explore the effects of monaural versus binaural delayed auditory feedback on sentence reading time and the number of articulation errors, as related to cerebral dominance.The specific questions investigated were:

  1. Does a binaural delay in auditory feedback cause differing responses in sentence reading time and/or total number of articulation errors when compared to a monaural delay in auditory feedback to the dominant and non-dominant ears respectively?

  2. Does a monaural delay in auditory feedback to the dominant ear cause differing responses in sentence reading time and/or total number of articulation errors when compared to a monaural delay in auditory feedback to the non-dominant ear?

The subjects used for the present study were selected from the Speech Department at the University of Nebraska.They met the following selection criteria:normal hearing, a display of definite dominance, and unfamiliarity with the DAF phenomenon.Five of the subjects were right sided and five were left sided.

An HC Electronics DAF Unit was used in the present study.A time delay of .20 second and an intensity level of 30 dB above SRT were utilized in this investigation.Under monaural DAF conditions, the contralateral ear was masked by presenting a combination of white and sawtooth noise.

On the basis of the relationships observed in graphical displays of the data and the results of statistical analysis, the following conclusions are offered:

  1. Sentence reading time and total number of articulation errors are greater under binaural DAF than under either monaural DAF in the dominant or non-dominant ear.

  2. Sentence reading time and total number of articulation errors are greater for the non-dominant ear under monaural DAF than for the dominant ear under monaural DAF.

  3. Results obtained for sentence reading time and total number of articulation errors for the dominant ear (under monaural DAF) approach those results reported for the binaural NDAF condition. It appears as if the dominant ear is better able to cope with difference in time and/or phase relationships than the non-dominant ear, and as a result can synthesize and correlate auditory stimuli more effectively.

Advisor: Herbert J. Arkebauer

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