Question

Explain the concept of 'Intelligence Quotient' (IQ) and how it is calculated.

Hint:

The traditional formula for IQ is:
\[ IQ=\frac{MA}{CA}\times100 \]
A score of {100} represents average intelligence, where mental age equals chronological age.

Answer 1

Step 1: Meaning of Intelligence Quotient (IQ).
Intelligence Quotient (IQ) is a numerical measure used to indicate a person's level of intelligence in comparison with others of the same age group. It reflects an individual's ability to think, reason, solve problems, learn quickly, and adapt to new situations. IQ tests are designed to evaluate various cognitive abilities such as memory, logical reasoning, problem-solving skills, and verbal ability.

Step 2: Concept of Mental Age.
The concept of IQ is based on the idea of Mental Age (MA) and Chronological Age (CA). Mental Age refers to the level of intellectual functioning of a person compared with the average abilities of individuals of different age groups. Chronological Age refers to the actual age of the individual measured in years.

Step 3: Formula for calculating IQ.
The Intelligence Quotient is calculated using the following formula:
IQ = (Mental Age / Chronological Age) × 100

Step 4: Example of calculation.
For example, if a child is 10 years old (chronological age) but performs on an intelligence test at the level of a 12-year-old child (mental age), then:
IQ = (12 / 10) × 100 = 120.
This means the child’s intelligence level is above the average for their age group.

Final Explanation:
Thus, Intelligence Quotient (IQ) is a standardized score that represents a person’s intellectual ability relative to their age. It is calculated by comparing mental age with chronological age and multiplying the result by 100.