EDUCATION (CBSE/UGC NET)

Detailed explanation-1: -Instead, Stern proposed dividing an individual’s mental age by their chronological age to obtain a single ratio. This formula was later improved by Lewis Terman, who multiplied the intelligence quotient by 100 to obtain a whole number.

Detailed explanation-2: -In 1912, William Stern, a German psychologist, devised the concept of Intelligence Quotient (IQ). IQ refers to mental age divided by chronological age and multiplied by 100. The number 100 is used as a multiplier to avoid the decimal point.

Detailed explanation-3: -The first IQ tests The German psychologist William Stern (1871-1938) introduced the idea of intelligence quotient, or IQ. This entailed a formula for mental age that could be assessed by a test, such as the one devised by Binet, divided by chronological age, multiplied by 100.

Detailed explanation-4: -The term ‘IQ’ was coined in 1912 by the psychologist William Stern in relation to the German term Intelligenzquotient. At that time, IQ was represented as a ratio of mental age to chronological age x 100. So, if an individual of 10 years of age had a mental age of 10, their IQ would be 100.

Detailed explanation-5: -Intelligence quotient (IQ) can be obtained by the equation MA/CA=IQ, where MA is mental age and CA is chronological age. This chapter discusses the concepts of mental age and IQ, and the operations by which they are measured.