alleryWho devised the IQ formula in 1912?
AWilliam Stern
BAlfred Binet
CLewis Terman
DDavid Wechsler
Answer & Solution
Correct answer: A. William Stern
1. Recall the fact: Stern defined IQ as mental age divided by chronological age, times 100.
2. The option "William Stern" matches it.
3. Why the others fail: Binet gave mental age; Terman and Wechsler built tests.
_Source: NCERT Class XII Psychology, Ch 1 Variations in Psychological Attributes (lepy101.pdf), "Assessment of Intelligence"_
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