________ devised a simple formula for calculating an index of intelligence, or intelligence quotient (IQ).
A) Theo Simon
B) William Stern
C) Franz Gall
D) Louis Thurstone

Question

Quizplus · Accepted Answer

The formula for calculating an index of intelligence or IQ was devised by German psychologist William Stern in 1912. The IQ score is calculated by taking the mental age of an individual (determined by an intelligence test) and dividing it by their chronological age, then multiplying by 100. This formula allowed for comparisons of intelligence between individuals of different ages.

________ Devised a Simple Formula for Calculating an Index of Intelligence