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It is kind of strange being called an expert on something that you did not learn from another expert. Nutshell means that I’ve left out a lot of details.
Maybe I will post additional blogs addressing each subject.
I have used this approach to publish questionnaire-based articles.
For example, a scaling technique might involve estimating individuals' levels of extraversion, or the perceived quality of products.
Certain methods of scaling permit estimation of magnitudes on a continuum, while other methods provide only for relative ordering of the entities.
The level of measurement is the type of data that is measured.
The word scale is sometimes (including in academic literature) used to refer to another composite measure, that of an index. With comparative scaling, the items are directly compared with each other (example: Do you prefer Pepsi or Coke? In noncomparative scaling each item is scaled independently of the others (example: How do you feel about Coke? Composite measures of variables are created by combining two or more separate empirical indicators into a single measure.
Reliability is the extent to which a scale will produce consistent results.