Intelligence
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Alfred Binet
Lewis Terman
William Stern
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Charles Spearman & General Intelligence
L.L. Thurstone & Primary Metal Abilities
Howard Gardner & Multiple Intelligences
Robert Sternberg & Triarchic Intelligence
Peter Salovey & John Mayer & Emotional Intelligence
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William Stern
William Stern is a German psychologist who derived the intelligence quotient. The intelligence quotient (IQ) is simply a person's mental age divided by chronological age and multiplied by 100 to get rid of the decimal point.