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Two students 'A' & 'B' were tested a standardized I.Q. test. 'A' has an I.Q. of 60 and 'B' has an I.Q. of 30. Which of the following statement is not true about 'A' and/or 'B'
1. 'A' has mild intellectual disability.
2. 'B' has a severe intellectual disability.
3. 'A' has a severe intellectual disability.
4. Both (1) and (2) are true

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Correct Answer - Option 4 : Both (1) and (2) are true

Intellectual disability is marked by an extremely low IQ of 70 or below on a test when the mean IQ score is 100. In addition to it, the child also should have a deficit in daily adaptive behavior such as self-care skills, communicating with others, being able to live on one’s own, etc.

Intellectual disability involves problems with general mental abilities that affect functioning in two areas:

  • Intellectual functioning (such as learning, problem-solving, judgment)
  • Adaptive functioning (activities of daily life such as communication and independent living)


Levels of intellectual disability Symptoms
Mild intellectual disability
  • taking longer to learn to talk, but communicating well once they know-how
  • being fully independent in self-care when they get older
  • having problems with reading and writing
  • social immaturity
  • increased difficulty with the responsibilities of marriage or parenting
  • benefiting from specialized education plans
  • having an IQ range of 50 to 69
Moderate intellectual disability
  • are slow in understanding and using language
  • may have some difficulties with communication
  • can learn basic reading, writing, and counting skills
  • are generally unable to live alone
  • can often get around on their own to familiar places
  • can take part in various types of social activities
  • generally having an IQ range of 35 to 49
Severe intellectual disability
  • noticeable motor impairment
  • severe damage to, or abnormal development of, their central nervous system
  • generally having an IQ range of 20 to 34
Profound intellectual disability
  • inability to understand or comply with requests or instructions
  • possible immobility
  • incontinence
  • very basic nonverbal communication
  • inability to care for their own needs independently
  • the need for constant help and supervision
  • having an IQ of less than 20 


Hence, we can conclude that 'A' has an I.Q. of 60 means 'A' has a mild intellectual disability and 'B' has an I.Q. of 30 means 'B' has a severe intellectual disability.

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