High School

Based on Terman's ratio IQ equation, what is Sally's IQ if she is 15 years old but has a mental age of 12?

Answer :

Sally's IQ, based on Terman's ratio IQ equation, is 80.

To calculate Sally's IQ using Terman's ratio IQ equation, we can use the following formula:

[tex]\[\text{IQ} = \left( \frac{\text{Mental Age}}{\text{Chronological Age}} \right) \times 100\][/tex]

Where:

  • Mental Age is the age at which Sally is functioning, which is 12 years.
  • Chronological Age is Sally's actual age, which is 15 years.
  • Plug in the values.

[tex]\[\text{IQ} = \left( \frac{12 \text{ years}}{15 \text{ years}} \right) \times 100\][/tex]

  • Perform the division.

IQ = (0.8) × 100

  • Multiply by 100.

IQ = 80