Intelligence quotient

An intelligence quotient (IQ) is a metric to measure human intelligence.

Eager to measure human minds, Terman plunged into intelligence testing soon after he arrived at Stanford. The original intelligence test had been designed five years earlier by French psychologist Alfred Binet as a tool to identify "slow" children needing special help. Terman and his Stanford colleagues translated Binet's test, adapted the content for U.S. schools, set new age norms and standardized the distribution of scores so that the mean score would always be 100. Terman called the new version the Stanford-Binet test. ~ Mitchell Leslie

With questions ranging from mathematical problems to vocabulary items, the Americanized test was supposed to capture "general intelligence," an innate mental capability that Terman felt was as measurable as height and weight. ~ Mitchell Leslie

Quotes

• Eager to measure human minds, Terman plunged into intelligence testing soon after he arrived at Stanford. The original intelligence test had been designed five years earlier by French psychologist Alfred Binet as a tool to identify "slow" children needing special help. Terman and his Stanford colleagues translated Binet's test, adapted the content for U.S. schools, set new age norms and standardized the distribution of scores so that the mean score would always be 100. Terman called the new version the Stanford-Binet test.
  With questions ranging from mathematical problems to vocabulary items, the Americanized test was supposed to capture "general intelligence," an innate mental capability that Terman felt was as measurable as height and weight. As a hardcore hereditarian, he believed that genetics alone dictated one's level of general intelligence. This vital constant, which he called an "original endowment," wasn't altered by education or home environment or hard work, he maintained. To denote it, he selected the term "intelligence quotient."
  • Mitchell Leslie, “The Vexing Legacy of Lewis Terman”, Stanford Magazine, (JULY/AUGUST 2000)

See also

• Intelligence