Validity of classification Flashcards
What did Kendler find in 1983? What type of validity is this referring to?
Found MZ concordance of 53% with DZ concordance being 15%. This supports the dopamine hypothesis. Aetiological validity.
What was Liddle’s study and what did he find? What type of validity is this referring to?
A cluster analysis finding 3 symptoms of clusters: positive, negative and cognitive disorganisation. Descriptive validity.
What did Rosenhan find in 1973? What type of validity is this referring to?
Psuedo-patients who stated they heard a thud were all but one diagnoses as having schizophrenia. Afterwards activity such as queuing early was suggested to be unusual i.e. oral inquisitive syndrome. Descriptive validity.
What did Swartz find? What was special about his study? What type of validity is this referring to?
A case study of an African woman found that the wrong treatment (anti-psychotics) were being prescribed for 10 years before epilepsy was found to be the problem. Once given the correct treatment the problems disappeared. Descriptive and predictive validity.
What finding undermines the predictive validity of classification?
30% of patients fail to respond to typical anti-psychotics.
Found MZ concordance of 53% with DZ concordance being 15%. This supports the dopamine hypothesis. Aetiological validity.
Kendler, 1983.
A cluster analysis finding 3 symptoms of clusters: positive, negative and cognitive disorganisation. Descriptive validity.
Liddle.
Psuedo-patients who stated they heard a thud were all but one diagnoses as having schizophrenia. Afterwards activity such as queuing early was suggested to be unusual i.e. oral inquisitive syndrome. Descriptive validity.
Ronsenhan, 1973.
A case study of an African woman found that the wrong treatment (anti-psychotics) were being prescribed for 10 years before epilepsy was found to be the problem. Once given the correct treatment the problems disappeared. Descriptive and predictive validity.
Swartz
