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Edited by: Published: 2018
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Scales are a group of items, all of which are intended to measure the same construct. They are often developed using classical measurement theory and are typically short, easy to administer, and score. Scales are integral to the process of assessment and evaluation and need to accurately assess constructs of interest in practice and research. Scales provide the framework for evaluating practice and testing research hypotheses.

The accuracy of a scale to measure what it is intended to measure is determined during the scale development phase. During this phase, it is important to follow certain basic rules to ensure that the scale is as reliable and valid as possible. In this process, the goal is to validate the scale in such a way that it is ...

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