On developmental assessment using an appropriate schedule, a 4-year-old child is found to have a mental age of 3 years. What is her developmental quotient (DQ)?
- A 60
- B 70
- C 75 ✓
- D 133
Correct answer: C. 75
Explanation
Developmental quotient equals mental age divided by chronological age multiplied by 100. Here DQ = (3 divided by 4) x 100 = 75, which falls in the borderline range (IQ/DQ 71 to 84) below the average range of 90 to 109. Option D results from inverting the ratio. Option B would require a mental age of 2.8 years, and option A a mental age of 2.4 years.
Reference: Ghai Essential Pediatrics, 9th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.