Validating survey instruments

14-Jan-2020 07:42

The triple of features to be compared is placed at the vertices of the triangle (See appendix).The participants move a dot to the position in the triangle where their preference is the right and proper balance.In a hospital setting in Sicily, we assessed a screening instrument developed for a prevalence survey of parkinsonism, peripheral neuropathies, stroke, and epilepsy.The subjects consisted of (1) hospital patients with any of the above-mentioned diseases, to investigate sensitivity; and (2) hospital visitors free of all these diseases, to investigate specificity.

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In this work, a solution to measure a teacher's views toward such a triple is offered by way of a three-way slider embedded in an equilateral triangle.An example may be the ranking preferences between the three colors, red, blue, and green.

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