Question

How I.Q. is calculated?

Answer 1

IQ is a number that shows a person’s intellectual ability compared to others of the same age. It is calculated using a formula or determined through standardized tests.

1. Traditional Formula:

IQ = `("Mental Age"/"Chronological Age")xx100`

Mental Age: The level at which a person performs mentally

Chronological Age: The actual age in years,

Example:

If a 10-year-old child has a mental age of 12,

IQ = `(12/10)xx100`

= 120

2. Modern IQ Tests:

Today, most IQ scores are calculated using standardized tests like:

• Stanford-Binet Intelligence Test
• Wechsler Scales (WISC, WAIS)

These tests compare a person's performance to others in the same age group. The average IQ is set at 100, with most people scoring between 90 and 110.