What is the definition of content validity, and what is the evidence for content validity of a scale?

Content validity- examines the extent to which the measurement method or scale

includes all of the major elements or items relevant to the construct being measured,

evidence includes:

How well the items of the scale reflect the description of the concept in the

literature

The content expert’s evaluation of the relevance of the items on the scale that

might be reported as an index

Potential subject’s responses to the scale items

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