German psychologist that coined the term Intelligence quotient aka IQ by
attempting to classify people according to types, norms, and aberrations. In result, Stern reviewed his findings and developed the idea of expressing intelligence test results in the form of a single number, the intelligence quotient. IQ = mental age X 100 Chronoligical age Intelligence quotient:defined originally as the ratio of mental age to chronoligical age, the average performance for a given age is given a scorce of 100. |