Bill Plummer

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“Modern” validation process Believes that the whole idea of constructs and latent traits runs aground on the concept of meaning of something you cannot observe Holds that the meaning of the of the score is the instrument itself (e.g. intelligence is defined as the score on a Stanford-Benet test) The game is to use one or more such instruments to make predictions that are observable Implies that any change in a questionnaire in principle defines a new quantity.
Current validity thinking Need to keep constructs--that’s where theories live. Focus on the fact that validity resides in the combination of instrument and its application--it is the study that is either valid or not Validity is not independent of the intended use of the study or the population under study Validity and the construct can evolve over time as more data comes in
Page 1 and 2: Patient Reported Outcomes: Word fro
Page 3 and 4: News from Lake Woebegone (and the r
Page 5 and 6: Basket of Care Total Knee Replaceme
Page 7 and 8: In Lake Woebegone they know the Dev
Page 9 and 10: A model architecture for data colle
Page 11 and 12: Model architecture Makes a wide cho
Page 13 and 14: Model Architecture Side Benefits Re
Page 15 and 16: Model architecture Side benefits: T
Page 17 and 18: How to think about PRO Instruments
Page 19 and 20: Purposes of questionnaires Opinion
Page 21 and 22: Scales and scores Likert scale: mul
Page 23 and 24: Example: How hard is is for you to
Page 25: Classical Validation Process Addres
Page 29 and 30: De facto position of medical litera
Page 31 and 32: During the past four weeks Oxford K
Page 33 and 34: Oxford Knee Score 9) How much has p
Page 35 and 36: The score for a question was the sa
Page 37 and 38: EQ-5D (EuroQoL Group) Five question
Page 39 and 40: EuroQoL seeks to provide a number i
Page 41: Disclosures Universal Research Solu

Bill Plummer

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