Schizophrenia

Question 1

Evaluate reliability in diagnosis and classification
(Reliable over time)

Answer 1

Beck et al found a 54% concordance rate between practitioners in 1962 while soderberg reported 81% when using the dsm5 in 2005 suggesting they have become more reliable over time.

Question 2

Evaluate reliability in diagnosis and classification
(Test retest)

Answer 2

Read et al reported test-retest reliability of sz to only have 37% concordance rate. They also found a study where a mix of British and American practitioners provided a diagnosis on a case description. 69% of the Americans diagnosed sz but only 2% of British suggesting diagnosis is unreliable

Question 3

Evaluate reliability in diagnosis and classification
(Jackobsen)

Answer 3

Jackobsen tested the reliability of the ICD10. 100 Danish patients with a history of psychosis were assesed with a 98% concordance. Demonstrating a high reliability of clinical diagnosis using up to date classification

Question 4

Evaluate reliability in diagnosis and classification
(Anxiety)

Answer 4

Reliability of sz diagnosis is assesed at 81% superior to anxiety disorders at 63%. Reliability of sz diagnosis is generally considered superior to validity

Question 5

Evaluate valdity in diagnosis and classification
(