Author: RxPG, Posted on Monday, July 05 @ 00:00:00 IST by RxPG  

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QUESTION.
A male child of 15 years, with a mental age of 9 years has an IQ of:
1. 50
2. 60
3. 70
4. 80

Answer
2. 60

Reference
A Short Textbook of Psychiatry by Ahuja 4 ed Page 146

Quality
Spotter

Status
Repeat

QTDF
Ahuja

Discussion
IQ or Intelligence Quotient is the basis for the classification of Mental Retardation
IQ is equal to Mental Age ie MA divided by Chronological Age ie CA multiplied by 100 ie IQ = MA/Cax100`
Classification of Mental Retardation is as follows

Mental Retardation Level IQ Range
Mild 50 – 70
Moderate 35 – 50
Severe 20 – 35
Profound < 20

Explanation
This is a Straight Forward Question and the answer is (9/15)x100 = 60 and the answer is choice 2.

Comments
The usual question in AIIMS and All India will not stop with this level. They will ask the degree of Mental Retardation. Fortunately, this year the question is too simple

Tips
Take this as a cue and go through all those tables dealing with Mild Moderate etc. Another area in your PG Preparation where you get tables with grading is Paediatrics. Pay special attention to the tables in Protein Energy Malnutrition


Explanation by : Dr Bruno, Author of