PSYCH 509 Lecture Notes - Lecture 7: Obsessive–Compulsive Personality Disorder, Inter-Rater Reliability, Social Anxiety Disorder
8 Feb 2017
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Diagnostic classification (cont"d: diagnosis: major depression, with medical comorbidity. Obsessive compulsive personality disorder, with poor insight. Psychosocial problem: recently moved to new city. Functioning over past year: severity of 2 just 4 months ago. Issues of validity and reliability: construct validity: the degree to which accurate statement and predictions can be made about diagnostic category. Etiological validity - degree to which patients with same diagnosis share common etiology. Schizophrenia patients tend to show high dopamine activity. Depressed patients tend to have low serotonin levels. Predictive validity - degree to which predictions can be made about future behavior of patients with same diagnosis. Schizophrenia patients tend to respond to neuroleptics, most other diagnostic groups don"t. Interrater reliability: extent to which clinicians agree in the diagnoses they give. Spitzer (1979) suggested 3 sources of error that lead to unreliable diagnoses. Criterion variance - occurs when diagnostic criteria are stated in vague ways. E. g. , dsm-1 and dsm-2 used vague criteria.
