Reliability of diagnosis

Question 1

Beck et al

Answer 1

-153 patients which schizophrenia assessed by two different psychiatrists
- diagnosis agreement rate was only 54%
- low inter-rater reliability

Question 2

Copeland

Answer 2

• description of patient to 134 US and 194 British psychiatrists
• 69% of US psychiatrists diagnosed the patient
• 2% of British psychiatrists diagnosed the patient

Question 3

Farmer et al

Answer 3

• standardised interview technique increases the reliability of diagnosis
• Present State Examination (PSE) focuses on the frequency and severity of symptoms
• standardised questions ensured replicability

Question 4

Mojtabi and Nicholson

Answer 4

• asked 50 senior psychiatrists in the US to differentiate between ‘bizarre’ and ‘non-bizarre’ delusions
• only 0.4 inter-rater reliability correlations

Question 5

Read

Answer 5

• test-retest analysis is as low as 37%