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.