Neuromaturation of Ear Asymmetry in Dichotic Listening of Children Aged 6-12 Years

Document Type : Original article

Authors

1 Student Research Committee. MSc in Audiology, Department of Audiology, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran

2 PhD, Assisstant Professor, Department of Audiology, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran

3 MSc in Biostatistics, Basic Sciences Department, School of Rehabilitation, Shahid Beheshti University of Medical Science, Tehran, Iran

Abstract

Background and Aims: Persian Pediatric Competing Words (PPCW) and Persian Randomized Dichotic Digit (PRDD) tests were previously developed and adapted for use in Persian language. The present study aimed to investigate the effect of age on the results of these tests in children.
Materials and Methods: The current observational and descriptive-analytic study was performed on 241 schoolchildren, including 122 (50.6%) male and 119 (49.4%) female children with an age range of 6 to 12 years. All children had a hearing level of 15 dB HL or lower in frequencies of 250-8000 Hz. Inter-aural hearing threshold asymmetry was less than 10 dB. Children’s handedness was determined using Chapman and Chapman handedness questionnaire. Ear advantage was calculated in two methods: right ear advantage and dominant ear advantage. The effect of age, gender, and handedness on the ear advantage was investigated.
Results: The results showed that as the children's age increased from 6 to 12 years, the ear scores for both of the tests increased. In general, the dominant ear advantage for the both tests was significantly greater than that for the right ear advantage. Also, it was found that the mean of the right ear advantage for both of the test was not significantly different between males and females and between right-handed and left-handed children.
Conclusion: The ear scores of PRDD and PPCW tests increased with age independent of the effect of gender and handedness of 6-12 year-old children. Dominant ear advantage is a more conservative method for reporting ear advantage.

Keywords

Main Subjects


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Volume 7, Issue 1
March and April 2018
Pages 110-117
  • Receive Date: 21 September 2016
  • Revise Date: 20 December 2016
  • Accept Date: 03 June 2017
  • First Publish Date: 21 March 2018