![]() Therefore, the body of evidence of a scale’s validity is never static it is a cumulative, active process with contributions made by the authors of the scale plus other researchers in the cognate field of interest. “The process of validation involves gathering, synthesising and evaluating data that typically includes confirming and disconfirming evidence” (Cizek, Citation2016, p. The validity of a test or scale can take many forms and is a continuous, dynamic, and mutual exchange of verification data. All tests, scales, and instruments that are used for clinical, educational or research purposes must exhibit key measurement properties (such as reliability/precision, validity, utility, fairness, clinical utility and responsiveness to change) so that they can be used with confidence, particularly those scales that are high stakes (American Educational Research Association, American Psychological Association, and National Council on Measurement in Education, Citation2014 Streiner, Norman, & Cairney, Citation2015). ![]()
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