Assertion: A Chronological 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.
Reasoning: Mental age is a measure of a person's intellectual development relative to people of their age group.
Answer & explanation
Correct answer: option 4
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.