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Binet produced his first test in 1905 and modified it in 1908 and 1911. His view was that intelligence was malleable. In 1909 he wrote:
- "Some recent philosophers have given their moral approval to the deplorable verdict that an individual's intelligencei a fixed quantity, one which cannot be augmented. We must protest and act against this brutal pessimism; we are going to try to demonstrate that it has no foundation whatsoever" (page 141 Binet, 1909)
Terman then went on to develop the Stanford-Binet IQ test, building on Binet's original work
Binet, A (1909). Les idees mordernes sur les enfants. Paris. Flammarion.