validity

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Related to Content validity: Face validity, Construct validity

validity

[və′lid·əd·ē]
(mathematics)
Correctness; especially the degree of closeness by which iterated results approach the correct result.

validity

the extent to which a measure, indicator or method of data collection possesses the quality of being sound or true as far as can be judged. For example, if a psychological measure, such as an intelligence test, is considered to be valid, this means that it is thought to measure what it sets out to measure. If social survey observations are said to have produced valid data, then they are considered to be true reflection of the phenomenon being studied in the population being studied (e.g. projections of voting behaviour), and the survey method could be said to have validity. Compare RELIABILITY.

In practice, in sociology and the social sciences generally, the relation between indicators and measures on the one hand and the underlying concepts they are taken to represent is often contested (see OFFICIAL STATISTICS, MEASUREMENT BY FIAT).

References in periodicals archive ?
Validity of contents is based upon careful examination of course, textbooks, syllabi, objectives and subject matter are known as content validity (Leng, 2002).
Content validity is defined as the degree to which the content of an instrument adequately reflects the content to be measured (Cordier et al.
With the results from this phase, Lawshe's modified content validity index (12) was determined to define inter-observer agreement among judges with Fleiss' kappa index.
Eventually a pilot study was conducted using the new questionnaire on 23 volunteered participants to determine the content validity of the questionnaire.
Item content validity index (I-CVI): This index rates the relevancy, clarity, and simplicity of each item.
Some changes were made on 30 items after qualitative face and content validity based on comments.
83 indicated good content validity and suggesting participants had no problem in understanding the questionnaire items.
Content validity is established by having a panel of experts familiar with the construct being measured judge the content of the instrument to establish how well they believe the items actually measure the content.
This modified Ebel procedure uses a mixed-methods approach to establishing content validity employing an iterative process that provides a feedback loop in determining consensus.
They used content analysis, Delphi polling, and content validity methods to generate a list, vetted by 2 different panels of supervision experts, of 33 competencies grouped into 5 categories.

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