validity


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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 ?
He said passports are costly to acquire and many people do not regularly travel and use their passports in the current five years validity period.
For 2019, the company has selected two distinguished first-year students to spend the summer in Validity's New York office, with an option to split their time working for a pro bono organization of their choice.
Validity was formed through a partnership with Silversmith Capital Partners, a Boston-based growth equity firm.
Predictive validity is the degree to which test scores are able to predict future performance on a domain of interest.4 This was replaced by Kane's unitary concept of validity for which evidence was collected.
In fact, the data obtained from ROC can be useful to provide evidence on the discriminant validity of the questionnaire.
The United States was required by US law on January 21, to reduce the visa validity and increase the visa fees to match Pakistan's practices for similar visa categories.
Conclusion: Construct validity of Assessment of Medical Educational Environment by the Teachers inventory could not be established, but the tool was found to be reliable.
3 extending the validity of the MOOE and CO components of the 2018 GAA (Budget) Joint Resolution Extending the Availability of the 2018 Appropriations for Maintenance and Other Operating Expenses and Capital Outlays to December 31, 2019,' Medialdea told reporters in a text message.
As the validity of the e-way bill depends upon the distance mentioned by the businesses, it was feared that this could lead to tax evasion by transporters making multiple trips on the basis of same e-way bill.
Equally or even more important (Ary, Jacobs, & Sorenson, 2010), and yet to be the focus of quantitative evaluation by the agricultural education profession, is validity. Validity has traditionally been defined as the extent to which an instrument measures what it purports to measure; however, the current definition of validity (Ary et al., 2010) no longer focuses on the instrument itself but, rather, "on the validity of the interpretations or inferences that are drawn from the instrument's scores" (p.
For example, if customers subscribe 3.5 GB pack having validity of 7 days, they are entitled to get daily 1 hours of free video streaming every day for 7 days.
The researchers found that the clinical validity and utility for some ctDNA assays was demonstrated with certain types of advanced cancer; however, for the majority of ctDNA assays there was insufficient evidence of clinical validity and utility in advanced cancer.