Evaluation: Diagnosis and Classification of Schitzophrenia
- Created by: theninjaemu
- Created on: 05-10-17 10:06
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- Evaluation: Diagnosis and classification of Schitzophrenia
- Reliability
- Cheniaux et al. (2009): 2 psychiatrists independantly diagnosed 100 patients using DSM and ICD
- 1st: 26 with Sz from DSM and 44 from ICD
- 2nd: 13 with Sz from DSM and 24 from ICD
- Diagnosis has poor inter-rater reliability
- A weakness of diagnosis of Sz
- Symptom overlap
- Overlap between Sz symptoms and other conditions e.g. bipolar disorder
- ICD would class a patient as having Sz, but DSM would diagnose bipolar
- Questions validity of diagnosis and suggests the 2 conditions may just be one
- Validity
- Validity assessed using criterion validity
- From Cheniaux et al (2009), Sz is more likely to be diagnosed using ICD than DSM
- Over-diagnosis in ICD
- Under-diagnosis in DSM
- This shows poor validity, so a weakness of diagnosis
- Co-morbidity
- Where 2 or more mental disorders are present in one person
- Buckley et al (2009): Sz patients have a high chance of being diagnosed with another mental illness
- If symptoms match, the sufferer may just have one condition
- This is a confusing picture of Sz diagnosis and classification
- Cultural bias
- Afro-Caribbean people are more likely to be diagnosed with Sz than white people
- Positive symptoms e.g. hearing voices is more acceptable in African cultures
- Reported to a psychiatrist because these seem irrational
- Beliefs e.g. comunicating with ancestors are more acknowledged in African cultures
- Psychiatrists over-interpret symptoms, leading to over diagnosis in one cultural group
- Gender bias
- Men are diagnosed with Sz more than women
- Female patients tend to function better than male and have good family relationships
- Explains higher diagnosis in men
- Female Sz is under diagnosed
- Statement about men being more likely to have Sz is false and diagnosis has questionable validity
- Reliability
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