When Goddard gave his IQ test to World War I military recruits, he included a scale that relied more heavily on pictures and acting out instructions. Still, he found 47 per cent of the men tested had a mental age of 13 or less. Why?
The men were mentally defective.
The test was culturally biased.
The test required more creativity than the Alpha test.
Goddard tested the men one at a time and discriminated against black recruits.