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validity, symptoms of sz are heterogenous- show differently in people -…
validity
comorbidity
more than one disorder/diagnosis that exists alongside a primary diagnosis
typically when two conditions are often diagnoses together
overlapping symptoms
SZ is pathognomic (no exclusive symptoms)
shares symptoms with
bipolar
OCD
autism
EV
research
rosenhan
sent pseudo patients to 12 hospitals
all got a diagnosis of SZ
follow up study
told doctors they had to find the fake patient
diagnosed one w/ sz
none had sz
buckley et al
found comorbid conditions w/ sz
could be subtypes of sz
50% depression
47% substance abuse
29% PTSD
15% panic disorder
23% OCD
all overlap w/ sz
konstanareas and hewitt
compared 14 autistic men with 14 schizophrenic men
none of sz had autism symptoms
50% of autistic patients had symptoms of sz
typically negative symptoms
improve validity
use of a classification system (DSM)
2+ criterias must be met
e.g characteristic symptoms and social/occupational malfunction
symptoms of sz are heterogenous- show differently in people