Diagnosis + classification of sz (AO3 (Low IR Reliability (Cheniaux et al.…
Diagnosis + classification of sz
ICD-11: 2 symptoms for 1 month or more
DSM V: 2 symptoms for 6 months or more
Flattening of affect
Alogia (poverty of speech)
Avolition (lack of motivation)
Low IR Reliability
Cheniaux et al. - DSM and ICD are inconsistent measuring tools - subjective criteria. Unreliable diagnosis / classification system could lead to
Inconsistent measuring tools
Copeland - 69% US psychiatrists (DSM) diagnosed sz, 2% UK (ICD) did. CULTURE BIAS?
BUT Schnider found First Rank Symptoms - form basis of both ICD and DSM. Increased consistency eg. auditory hallucinations
Buckley - half of patients with sz also have substance abuse (47%) and depression (50%) - could go
/untreated and make other disorder worse?
Overlap of symptoms
Ellason + Ross - people with DID have more sz symptoms than people diagnosed with sz! Could be
or visa versa - treating wrong disorder?