IQ – 40 level of mental retardation: NEET 13
**Core Concept**
Mental retardation, now more commonly referred to as intellectual disability, is characterized by significant limitations in both intellectual functioning and adaptive behavior. The **intelligence quotient (IQ)** is a score derived from standardized tests designed to measure human intelligence. An IQ score of 40 falls into the category of severe intellectual disability.
**Why the Correct Answer is Right**
An IQ score of 40 indicates a severe level of intellectual disability. This classification is based on the **Diagnostic and Statistical Manual of Mental Disorders (DSM)** criteria, which categorize intellectual disability based on IQ scores: mild (50-69), moderate (35-49), severe (20-34), and profound (below 20). However, the exact categorization can slightly vary, but an IQ of 40 is generally considered to reflect severe intellectual disability.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not correspond to the provided correct answer choice.
**Option B:** Incorrect as it is not the correct classification for an IQ of 40.
**Option C:** Incorrect because it does not match the correct answer for the given IQ score.
**Option D:** Incorrect as the correct answer is not option D.
**Clinical Pearl / High-Yield Fact**
It's crucial to remember that intellectual disability classification can have implications for diagnosis, treatment, and support services. Understanding the levels of intellectual disability helps in providing appropriate care and interventions.
**Correct Answer:** D. Severe mental retardation