Schziophrenia- Reliability & Validity Essay Plan

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Jessica Leigh
Psychology
Schizophrenia
AO Description
_
AO Definition of reliability- Consistency.
1
AO Ways of measurement- Inter rater(two)& test-retest(one).
1
AO Problems with reliability are with the diagnostic tools used.
1
AO UK- ICD; One month, Not multi axial, 7 sub types.
1
AO USA- DSM; 6 months; Not multi axial, 5 subtypes.
1
AO Paranoid, Undifferentiated, Catatonic, residual, disorganised, post schizo(UK) & Simple
1 schizo(UK).
AO Definition of validity- accuracy.
1
AO Checked via- predictive, reliability & descriptive (sub type patients share symptoms).
1
AO Problems occur with overlapping symptoms (comorbidity).
1
Reliability and validity of the diagnostic systems for
Schizophrenia essay plan.
AO Description
_
AO Not Multi-Axial ­ Individual Differences, Culture, Class. African Americans Research &
2 Chinese Homosexuality example.
AO Test retest- Favour of diagnosis.
2
AO ICD- small duration period; less time for good diagnosis, lowers chances of consistency &
2 not suitable for predictive validity. More subtypes are more room for error.
AO DSM- Less subtypes gives a less of a range which means diagnosis may not be consistent.
2 More reliable due to simplicity.
AO Undifferentiated and disorganised has a fine line.
2
AO Undifferentiated- too little or too many. Doctors will have different limits.
2
Disorganised- If diagnosis where reliable this would not exist. Does not give any information
on symptoms of patient when communication with other professionals.
AO Scarz- can't agree on whether mental health is real.
2
AO Reliability rates- Concordance rates in Schizophrenia are 81% whereas anxiety is 61%.
2

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Jessica Leigh
Psychology
Schizophrenia
AO Research
_
AO Rosehan- Got normal patients to go into mental institution by claiming they are hearing
1 voices saying thud. Only symptom they showed. When they told them it was an experiment
they did not believe them. The only way for them to get discharged to agree they were
insane and pretend to get better. When word got out the institutions claimed that they
would be able to spot the insane people.…read more

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