validity and reliability of diagnosis Flashcards
what is validity in diagnosis?
have we given the correct diagnosis
what is reliability in diagnosis?
if they were diagnosed again would they get the same diagnosis
what is concurrent?
2 seperate tests/measures give the same diagnosis
what is construct?
do the symptoms of the DSM match with the patient -should match
what is predictive validity?
suggesting how an illness will progress and these drugs will help (predicting the outcomes)
what is aetiological?
when characteristics match up to what we expect about the illness i.e. genetics
what is inter-rater?
2 different doctors give the same diagnosis
what is restest?
getting the same diagnosis when rediagnosed i.e. different versions of DSM
how might standardised symptoms in diagnostic manuals affect the validity and reliability of diagnosis? (4)
+allows doctors to predict progress of symptoms (predictive validity) and drugs that can help
+aetiological validity-can compare/match up symptoms of person and manual
+standardised symptoms can base off when different doctors are diagnosing (inter-rater reliability)
-standardise symptoms-easy to fake/lie about symptoms when diagnosing-reduced validity of diagnosis
how might the DSM and ICD differences affect the validity and reliability of diagnosis?
- affects reliability-different doctors might diagnose differently-cultural differences
- acts predictive validity- cultural differences=different data on illnesses
- affects retest if diagnosed with both manuals
- concurrent- 2 seperate tests might not give same diagnosis
how might the co-morbidity affect the validity and reliability of diagnosis?
-doctors may diagnose one condition only and another doctor diagnose the other condition- affects validity and reliability and treatment-mistake symptoms for one condition that’s from the other
how might updates to the DSM and the ICD affect reliability or construct validity?
updates may change diagnosis criteria affecting reliability of diagnosis.
update/change to symptom in criteria may mismatch symptoms of patient affecting construct validity
how might patients lying about their symptoms affect the reliability or validity of diagnosis?
patients lying about their symptoms will incorrectly diagnose patients (misdiagnosis)- can affect5 inter-rater reliability and validity of a diagnosis
