Basics of Measurement
In Chapter 4 we established a strong distinction between measurement studies to determine how well (with how much error) we can measure an attribute of interest and demonstration studies, which use these measures to make descriptive or comparative assertions. Whereas we might conclude from a measurement study that a certain process makes it possible to measure the “speed” of a resource in executing a certain family of tasks to a precision of ±10%, we would conclude from a demonstration study that a hospital where resource A is deployed completes this task with greater speed than a hospital using resource B. Demonstration studies are the focus of Chapter 7; measurement and measurement studies are the foci of this chapter and the next.
KeywordsMeasurement Error Content Validity Measurement Process Reliability Coefficient User Satisfaction
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