Intellectual Disability. Psychology


  • A neurodevelopmental condition in which IQ falls below 70
  • Adaptive behavior across conceptual, social, and practical domains of life is severely deficient for a person of a particular age.
  • Symptoms must also first be present during the developmental period.

Four Levels of Intellectual Disability

  • Mild, Moderate, Severe, and Profound.
  • Determined by the level of adaptive functioning and level of supports the individual needs in their daily life.

Common Causes

  • Deprived environments
  • Chromosome and genetic disorders
  • Dietary deficiencies
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