The IQ of a 6 -year-old with a measured mental age of 9...

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Key Concepts

Ratio IQ Calculation

The ratio IQ calculation is a method of determining IQ by dividing the mental age by the chronological age and then multiplying the result by 100. This formula was commonly used in early intelligence assessments, allowing for a direct comparison of an individual's cognitive performance relative to their actual age.

Intelligence Quotient (IQ)

IQ is a score derived from standardized assessments designed to measure human intelligence. It often involves comparing an individual’s performance on cognitive tasks to the normative performance of others in the same age group. The IQ score is traditionally used to identify intellectual strengths and potential areas for cognitive development.

Mental Age

Mental age refers to the age at which an individual operates cognitively, based on standardized test performances, rather than their chronological age. It indicates the level of intellectual functioning and cognitive development, helping to determine how a person’s intellectual abilities compare to typical developmental milestones.

Chronological Age

Chronological age is the actual age of an individual as measured from birth. In intelligence testing, it serves as a benchmark for comparing mental age, as it represents the expected cognitive development level for a specific number of years of life.

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