What does the term "mental age" refer to in intelligence testing?

• A. A person's age in years
• B. Comparison of cognitive abilities with age peers
• C. Emotional maturity in relation to age
• D. Developmental milestones for children

Answer: (B)

The term "mental age" refers to the level of cognitive ability or intelligence that an individual exhibits in comparison to their chronological peers. It is a concept developed in early intelligence testing to describe the age at which an individual's cognitive performance aligns with the average performance of others in the same age group. For instance, if a 10-year-old child performs on cognitive tests at the level of an average 12-year-old, their mental age would be reflected as 12, regardless of their actual age.

This approach allows for a comparison of a child's intellectual competencies with those of peers and helps identify whether they are performing below, at, or above expected levels for their age group. The other options do not capture this specific meaning: a person's age in years is merely a measure of time, emotional maturity pertains to social and emotional development rather than cognitive abilities, and developmental milestones focus on physical and behavioral achievements rather than direct assessments of cognitive performance.