Schizophrenia introduction - AO3

Question 1

What is a strength of the diagnosis and classification of schizophrenia?

Answer 1

• P: Strength = reliability
• E: Inter-rater reliability: Different people separately reach the same diagnosis, Test-retest reliability: Same person gives the same diagnosis two different times
• E: Osorio et al. (2019): Inter-rater = +0.97 and test-retest reliability = +0.92 for 180 diagnosis using DSM-5
• L: So diagnosis of schizophrenia is consistently applied

Question 2

What is a limitation of the diagnosis and classification of schizophrenia?

Validity

Answer 2

• P: Limitation = validity
• E: Criterion validity = whether different classification systems produce same diagnosis
• E: Cheniaux et al. (2009): 100 clients assessed with ICD-10 or DSM-IV criteria. ICD = 68 diagnosed DSM = 39 diagnosed

Question 3

What is a limitation of the diagnosis and classification schizophrenia?

second peel

Answer 3

• P: Limitation = co-morbidity with other conditions (depression)
• E: If two groups of symptoms frequently cluster, may be better classified as one disorder
• E: Buckley et al. (2009): 50% of people with SZ also had depression, 23% OCD
• L: So SZ maybe not a distinct condition, this leads to misdiagnosis

Question 4

What is a limitation of the diagnosis and classification of schizophrenia?

Answer 4

• P: Limitation = symptom overlap with other conditions
• Both SZ and bipolar share positive symptoms (delusions) and negative (avolition)
• Classification may not be inaccurate - they may not be different conditions
• L: So diagnosis may not be inaccurate