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30 October, 16:02

Mrs. Ross, a teacher, wanted to measure the IQ of the newly admitted students in her class. While using William Stern's method for calculating intelligence, she found out that Sarah, a ten-year-old girl, had the mental age of a 14 year old. What is Sarah's intelligence score?

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  1. 30 October, 16:32
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    140

    Explanation:

    William Stern, the German psychologist, devised the fundamental definition of intelligence quotient or IQ in 1912. He defined IQ as a ratio of an estimated mental age and actual age by multiplying it with 100. The equation can be reached thus:

    100 * (mental age/actual age).

    In case of Sara, her actual age is 10 and her mental age is 14. Therefore, her IQ is equal to 100 x 14/10 = 140
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Home » Social Studies » Mrs. Ross, a teacher, wanted to measure the IQ of the newly admitted students in her class. While using William Stern's method for calculating intelligence, she found out that Sarah, a ten-year-old girl, had the mental age of a 14 year old.
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