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Ear and hearing survey handbook

WORLD HEALTH ORGANISATION (WHO)
May 2020

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This survey handbook provides guidance for planning and implementing hearing loss surveys, including information on possible data collection tools. The survey handbook aims to enable countries – particularly low- and middle-income countries – to gather data by planning and implementing population-based epidemiological surveys.

The main uses of data collected by such surveys are:

  • to provide an accurate picture of hearing loss prevalence in a given area, which could be a country or an area within the country (e.g. district or state);
  • to provide an overview of the most common probable causes of deafness and hearing loss in the study area;
  • assess global and regional prevalence and trends

 

Using this survey handbook for data collection will help to ensure comparability of data collected through studies conducted in different countries and by different investigators. This will facilitate the estimation of global prevalence and the examination of hearing loss trends over time.

Effect of Abacus Training on Numerical Ability of Students with Hearing Loss

JADHAV, Atul Kaluram
GATHOO, Varsha Shrikant
2018

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Purpose: The study focussed on the effect of Abacus training on numerical ability (comprising of counting and mathematical operations) of children with hearing loss.

 

Method: 90 students with hearing loss were sampled from 6 special schools in Mumbai, India. A quasi- experimental study was employed using two group pre-test and post-test design. Data were collected using the Numerical Ability Test (NAT) as an instrument. Six null hypotheses based on the objectives were formulated and tested at 0.05 level of significance using t-Test - Assuming Equal Variances.

 

Results: The findings revealed that the experimental group which was instructed through Abacus showed higher proficiency in numerical ability as compared to the control group instructed through the conventional method. Gender as a variable seems to influence the mean achievement of numerical ability of students with hearing loss. While girls and boys did not differ in simple tasks such as counting, boys were found to be better in mathematical operations and overall numerical ability.

 

Conclusions: The Abacus teaching method results in higher mathematical achievements among students with hearing loss. Gender also plays an important role in mathematical learning, as evidenced by boys demonstrating more numerical ability than girls in the study sample.

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