Validity Research Classification

Question 0

Bentall et al
1988
20% recover to previous functioning
10% significant and lasting improvement
30% some improvement intermittent relapse

Answer 0

SZ early share symptoms or same outcomes

Little predictive validity - some people never recover, but many do

Question 1

Buckley et al
2009
Comorbid depression 50% patients
Co morbid substance abuse 47%
Creates difficulties in diagnosis of a disorder and deciding treatment

Answer 1

.

Question 2

Weber et al
2009
6 million hospital discharge records to calculate comorbidity rates. Found that as a consequence of being diagnosed SZ, received lower standard of medical care

Answer 2

Adversely affected prognosis

Comorbid illness tends to be asthma, t2 diabetes, hypertension

Question 3

Kessler et al
1994
Suicide 1% SZ alone
40% SZ and comorbid mood disorder

Answer 3

Comorbid depression is major cause for suicidal behaviour

Question 4

Harrison et al
1997
SZ 8 times higher for African-Caribbean (46.7 per 100,000) than white (5.7 per 100,000)

Answer 4

Misdiagnosis from cultural differences, language, mannerisms, difficulties in relations between black patients and white clinicians

Question 5

Ellison and Ross
1995
People with DID actually have more SZ symptoms than people with SZ

Answer 5

Many SZ symptoms are found in other disorders
-depression
-bi polar disorder
Identification may not lead to more valid diagnosis