The best way to tackle this question is to have 3 main points
Whats the issue? AO1
Why is this an issue? AO2
What is the implication of it? AO2
Whats the issue? Lack of Inter-Rater Reliability
One issues related to the classification and diagnosis of schizophrenia is reliability. This refers to the consistency of a measuring instrument, such as the DSM or ICD that is used when classifying and diagnosing schizophrenia. Reliability can either be measured in terms of inter-rater reliability, which is the extent to which two or more independent assessors give a similar diagnosis, or in terms of test-retest reliability which is the extent to which the tests used to deliver these diagnoses are consistent over time.
