ask a few questions so that we might be able to determine the appropriate category of measurement methods. Those questions are: • What are the parts of the thing we’re uncertain about? Decompose the uncertain thing so that it is computed from other uncertain things. • How has this (or its decomposed parts) been measured by others? Chances are, you’re not the first to encounter a particular measurement problem, and there may even be extensive research on the topic already. Reviewing the work of others is called “secondary research.” • How do the “observables” identified lend themselves to
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