Psychopathology - Definitions of abnormality Flashcards
What are the 4 ways to define an abnormality?
Statistical infrequency
Deviation from social norms
Failure to function adequately
Deviation from ideal mental health
What is Statistical infrequency?
Members of the population that fall outside the standard deviation, on the normal distribution curve.
What is considered statistically infrequent?
- /+2 SD of the mean
2. 1% (on each side of the curve)
What % of the population will be within the 1 SD of the mean?
68%
What % of the population will be within the 2 SD of the mean?
95%
What are the limitations of statistical infrequency?
- Both ends of the curve should be considered abnormal, but isn’t
- 8-10% of the UK have depression, behaviour doesn’t have to be rare to be abnormal
What is the strength of statistical infrequency?
In clinical diagnosing it is useful to know frequency of behaviour. Diagnosis will always require other features than just unusualness.
What is deviation from social norms?
Behaviour that goes against unwritten expectations and rules in a society/culture.
What are examples of past things that were considered against social norms?
Inter-racial marriage
Children being born to single mothers
Men having long hair
(These were looked down just in society not a clinical diagnosis)
What are the limitations of deviation from social norms?
Things that professionals call abnormal may not be considered abnormal in the future. E.g. homosexuality was a mental disorder in the DSM until 1973.
Varies across culture.
Can be used to support discrimination. E.g. Drapetomania is a ‘mental illness’ that caused black slaves to run away in 1851.
What is a strength of deviation from social norms?
Has ideas about desired behaviour. So can be used to refer to what is socially acceptable.
E.g. can be used to diagnose Antisocial personality disorder (this is where a person is manipulative, deceitful and reckless, and will not care for other people’s feelings.)
What is failure to function adequately?
This is where someone is unable to cope with the daily demands of everyday life.
What are the 4 criteria of failure to function adequately?
- Person cannot cope with the demands of everyday life
- Behaviour is maladaptive/irrational or dangerous
- Behaviour causes distress to the person
- Behaviour causes distress to others
What are the strengths of failure to function adequately?
- Takes into account the feelings of the person and the affects of those around them
- Used in the DSM for disorders such as OCD, anxiety and depression
What are the limitations of failure to function adequately?
- It is subjective judgement made by the psychiatrist as there is no objective test
- Others distress could be due to social norms being broken