High School

If a four-year-old child were shown to have a mental age of four when taking the Stanford-Binet test, the child's IQ would be _____.

Answer :

Final answer:

The IQ of a four-year-old child with a mental age of four, as tested by the Stanford-Binet test, would be 100, reflecting average intelligence.

Explanation:

The IQ (intelligence quotient) of an individual is calculated by using the formula:

IQ = (Mental Age/Chronological Age) x 100.

If a four-year-old child is shown to have a mental age of four when taking the Stanford-Binet test, this would mean that the child's mental abilities are equal to that which is typically expected at their chronological age.

Using the above IQ formula:

  1. Mental Age: 4 years
  2. Chronological Age: 4 years.

The IQ would therefore be calculated as follows: IQ = (4/4) x 100 = 100. Thus, a four year old child having a mental age of four would have an IQ of 100.

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