In 1905, Alfred Binet and Theodore Simon, made the first successful attempt to formally measure intelligence. In 1912 ______ designed the concept of Intelligence Quotient (IQ).
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → William Stern
In 1912 the German psychologist William Stern devised the concept of Intelligence Quotient (IQ): mental age divided by chronological age, multiplied by 100.
Note 1: A similar question was also asked in CUET (UG) 2023 on 29-05-2023 (Slot 1).
Note 2: A similar question was also asked in CUET (UG) 2024 on 19-07-2024 (Slot 1), and in CUET (UG) 2026 on 29-05-2026 (Slot 2).
NCERT (2025-26): “Assessment of Intelligence … In 1908, when the scale was revised, they gave the concept of Mental Age (MA), which is a measure of a person’s intellectual development relative to people of her/his age group. A mental age of 5 means that a child’s performance on an intelligence test equals the average performance level of a group of 5-year olds. Chronological Age (CA) is the biological age from birth. A bright child’s MA is more than her/his CA; for a dull child, MA is below the CA. Retardation was defined by Binet and Simon as being two mental age years below the chronological age. 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.…” |