Definition: The degree to which a measurement includes all aspects of the concept that the researcher claims to measure; “A qualitative type of validity where the domain of the concept is made clear and the analyst judges whether the measures fully represent the domain” (Bollen, 1989, p.185). It is a component of construct validity and can be established using both quantitative and qualitative methods, often involving expert assessment.
References: Bollen (1989), Brod et al. (2009), Drost (2011), & Haynes et al. (1995)
Drafted and Reviewed by: Annalise A. LaPlume, Mahmoud Elsherif, Wanyin Li, Aoife O’Mahony, Eike Mark Rinke, Sam Parsons, Graham Reid
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