Abnormality revision
- Created by: hollieguest
- Created on: 23-03-15 16:32
Definitions of Abnormality
Deviation from social norms:
- These are implicit rules about how we ought to behave - violation of these rules is considered 'abnormal' (e.g. talking to ourselves in public)
- What is considered a norm vary's in cultures
- An example of this definition: Schizophrenia - against social norms to hear voices in your head and talk to yourself in public.
Limitations:
P - social norms change over time
E- homosexuality was considered a mental dissorder in the DSM until 1973
E - this questions validity and defining what behaviours can be classed as abnormal
Definitions of Abnormality
Failure to function adequately:
- 'functioning adequately' is being able to function normal social duties.
- if a persons behaviour interferes with their ability to operate within those limits, it is considered abnormal.
- for example, Anorexia Nervosa causes disruption to work, sleep and study.
Limitations:
P - What is adequate in one country may differ in others
E - in the UK people tend to keep emotions to themselves, however in other countries they may display different kinds of grief openly, which is not at all abnormal
E - therefore this definiton is an ethnocentric diagnosis of mental dissorders
Definitions of Abnormality
Deviation from ideal mental health (JAHODA 1958):
1. Self actualisation - a person must become the best that they can possibly be
2. Positive view of self - the person must have a feeling of self worth
3. Autonomy - must not have to rely on others for everything
4. Accurate view of reality - persons view of world must not be dissorted in any way
5. Environmental adaptability - ability to change behaviour to make in suit certain environments
6. Resistance to stress - able to deal with regular strains and stresses of life
JAHODA talked about normality being a state of positive mental health
P- a number of the criteria are difficult to reach
E- Actualisation in particular is reached by few people in life
E- Therefore if this definition is taken literally, most would be classified as abnormal
The Biological Approach
ALL mental disorders have a physical cause
Infection - mental illness is caused by a virus or bacteria
Genetics - mental illness is the result of an inherited gene e.g. relatives of Schizophrenics are 18 times more likely to be diagnosed with Schizophrenia
Biochemistry - disorders may be explained in terms of an imbalance in brain chemicals
Neuroanatomy - changes in brain structure may cause abnormality e.g. brains of Schizophrenics tend to be smaller and have enlarged ventricles
Research Support: Holland (1968)
The Biological Approach
Holland (1968)
Aim: investigate wether there is a genetic basis for Anorexia
Procedure: The Pp were 45 twins, at least one twin had Anorexia.
30 female twin parts (16 MZ and 14 DZ) 4 male pairs and one set of make triplets
Data was collected on each twin/triplet and checked for concordance rates
They were interviewed on eating habits, body satisfaction and ED relatives
Findings: MZ = 56% DZ = 5%
none of the male co-twins had Anorexia (discordant) and the anorexic male twin tended to have been disadvantaged and was the less dominant twin.
Conclusion: As the concordance rate was not 100% (not purely genetic) this study suggests that there is a genetic vulnerability for Anorexia which is triggered by environmental factors.
The Biological Approach
Evaluating the Biological Approach:
P - the model is supported by research into the genetic basis of abnormality
E - Holland found a 56% concordance rate with MZ twins for Anorexia and only 5% for DZ twins, suggesting that there is a genetic vulnerability to anorexia.
E - therefore suggests the model is reliable and valid
P - the approach also has a number of successful theraputic applications
E - chemotherapy is the most common form of treatment for psychological disorders in the UK
E - as the treatments are effective this must therefore suggest that the approaches beliefs about the causes and consequent implications are correct
P - however, although treatments are successful it is difficult to indicate cause and effect
E - High concordance rates between parents and children with disorder may not be due to genetic inheritance but social learning instead
E - therefore more research is needed to be able to draw consitent and valid conclusions
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