The Binet-Simon scale of intelligence expressed a child’s score in terms of mental age.
This is a cognitive and intelligence test used to diagnose developmental or intellectual disabilities in young children. The test measures five weighted factors and consists of both verbal and nonverbal subtests.
From Binet's work, the term "Intelligence Quotient" or "IQ" has been added to the vocabulary. IQ is the ratio of "mental age" to real age, with an average of 100. So her IQ of an 8-year-old child who passed the 10-year-old test would be 10/8 x 100, or 125.
Binet-Simon and his colleague Theodore Simon developed a series of tests to assess mental abilities. Instead of focusing on learning information such as math or reading, Binet focused on other mental skills such as attention and memory.
Learn more about Binet-Simon at
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