definitions of abnormality

• statistical infrequency

  This occurs when an individual has a less common characteristic compared to the population e.g a low score on an IQ test.
• deviation from social norms

  This concerns behaviour that is different from the accepted standards of behaviour in a society.
• failure to function adequately

  This occurs when someone is unable to cope with the ordinary demands of day to day life.This may cause distress to others.
• deviation from ideal mental health

  This occurs when an individual does not meet the set criteria for good mental health.