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With the help of several neighbouring Medical Officers of Health, she collected a representative study group of 122 deaf and partially hearing children (72 boys and 50 girls) under the age of 7 years.Because 47 of the study children were aged between 3 years 6 months and 4 years 11 months it was possible to draw useful comparisons with the findings of the Newsom's well-known recent study of normal 4 year olds growing up in an ur- ban community.The research was based on a tape recorded personal interview with the mother in the home,
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