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PSYCHOLOGY REVISION




Classification and diagnosis of Schizophrenia

Issues of reliability:
Inter-rater reliability

Carson 1991
Claimed the DSM had fixed the problem of IRR
Psychologists now had a reliable classificiation system

Evaluation of IRR

Whaley 2001
Found IRR scores as low as +11
Identifies lack of reliability due to such a…

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PSYCHOLOGY REVISION




As a consequence of being diagnosed with schizophrenia is that patients tend to
receive poorer medical care
This in turn affects their prognosis.
And so affects the validity as we are in fact investigating the medical disorder and
treatment received, rather than comorbidity as a whole

Comorbidity and…

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