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IQ test – 3 levels of stupidity

Normal curve

Normal curve

 

Mental deficiency used to be more finely classified using the following technical terms that later began to be abused by the rest of society (5):

IQ Range Classification

  • 50-69 Moron
  • 20-49 Imbecile
  • below 20 Idiot

 

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Introduction to Mental Retardation

An individual is considered to have mental retardation based on the following three criteria:

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