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Validity

The concept of validity is central to the understanding of development across the human life span as well as in every other area of scientific inquiry. Generally, validity is defined as the accuracy of an inference or conclusion. There are two main types of validity—test validity and experimental validity. Each of these types of validity can be broken down into several parts. This entry examines these two main types of validity, using examples which emphasize its importance to the understanding of life-span development.

Test Validity

Test validity, or the validity of an assessment, measure, or inventory, exists as a matter a degree. Test validity refers to the extent to which evidence and theory support the accuracy of the interpretation of the test score. Historically, test validity has ...

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