A2 Psychology AQA A Schizophrenia Classification and diagnosis revision sheet :)

HideShow resource information
  • Created by: Liberty
  • Created on: 05-12-12 09:02
Preview of A2 Psychology AQA A Schizophrenia Classification and diagnosis revision sheet :)

First 274 words of the document:

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 low score
Rosenhan's study
21% detection rate, when he sent no patients!
Mojitabi & Nicholson 1995-Unreliable symptoms
Distinguishing between bizarre and non-bizarre delusions
IRR of only +40
So this lacks sufficient reliability for it to be a reliable method of diagnosing
Cheniaux 2009
IRR according to DSM & ICD
IRR was above +10 but according to ICD not DSM
So lacks validity as not measuring the DSM as first claimed and reliability as it
shows the DSM cannot provide a reliable criteria.
Test-retest reliability
Wilks et al 2003
Administered 2 alternate forms of the RBANS test over 1-134 days
The result was high at a TRT score of 84
Evaluation of TRT
Prescott 1986
Measured attention and information processing in 14 schizophrenics
Performance was stable over 6 months
Issues of Validity:
The extent to which two or more conditions occur at the same time
Buckley et al 2009
Estimated that comorbidity occurs in 50% of patients & 47% of patients have a
lifetime diagnosis of substance abuse
Evaluation of Comorbidity-
Weber et al 2009- Comorbidity and medical complications
Found evidence of many comorbid non-psychiatric diagnoses.
Patients diagnosed with primary schizophrenia also had a medical condition.

Other pages in this set

Page 2

Preview of page 2

Here's a taster:

As a consequence of being diagnosed with schizophrenia is that patients tend to
receive poorer medical care
This in turn affects their prognosis.…read more


No comments have yet been made

Similar Psychology resources:

See all Psychology resources »See all resources »