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dec 1, 1911 - William Stern developed a formula for the Intelligence Quotient (IQ)

Description:

Stern proposed dividing an individual's mental age by their chronological age to obtain a single ratio.

Added to timeline:

Famous psychologist's timeline

ByMatthew LaBreck

5 Feb 2024

0

0

210

Date:

dec 1, 1911

Now

~ 113 years ago

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