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reliability - Coggle Diagram
reliability
test retest reliability
external reliability
clinicians make same diagnosis on different occasions
use the same info each time
what about when negative symptoms change over time?
EV
research
copeland
gave description of patient to 134 US/ 194 UK psychologists
US- 69%
UK- 2%
shows lack of reliability
read
test retest analysis is 37% for SZ
potential false negatives/positives
the wrong people may get diagnosed
the right people may not get diagnosed
some given incorrect treatment
increased reliability
DSM symptoms is regularly revised
creates consistency
all clincians would look for 2+ symptoms
must last over a month
one positive symptom must be there
increased reliability
farmer et al
standardised interview technique introdruced
created the Present State Examination (PSE)
focuses on frequency/severity of symptoms
inter rater reliability
clinicians make identical diagnoses of the same patient independently
what could impact this?
different diagnosis manuals (ICD vs DSM)
training/confidence of pyschiatrist
personal experiences of clincian
culture of clincian/patient
gender e.g women are high functioning SZ