Validity
From My brain 2.0
According to the American Educational Research Association, validity refers to the degree to which evidence and theory support the interpretations of test scores entailed by proposed uses of tests.
The important word here is interpretation. Often validity is thought to be a property of a test, which is false. All tests are 100% valid. Measurements in themselves are never wrong, they also have little value. It is our understanding of what these measurements mean that is valuable, but also subject to question and prone to error.
References
- American Educational Research Association, American Psychological Association, & National Council on Measurement in Education. (1999). Standards for educational and psychological testing. Washington, DC: American Educational Research Association.
- Dylan Wiliams (2001) An overview of the relationship between assessment and the curriculum, in: D. E. Scott (Ed.) Curriculum and Assessment, pp. 165–182 (Westport, CT: Ablex Publishing).
