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 ?
For the tests of external validity, the participants' scores from the SNA process were compared to their STI scores.
For external validity to hold, the researcher(s) must have a large, random, representative sample or very specific data for the question at hand, and those results should be easily replicated.
First, as noted, GS should attend to issues of external validity.
Building on previous research, we present several types of evidence on the external validity of experiments on individual compliance decisions.
Then, in order to find evidence of external validity for the S-PNTS, a stepwise linear regression analysis between the need thwarting subscales (as independent variables) and burnout (as the dependent variable) was performed.
Despite a range of effect size estimates, only studies with zero or one threat to external validity had values statistically greater than 0.
External validity concerns the question of whether the results of studies using experimental designs can be generalized to natural settings" (p.
One should avoid repetition of results in the discussion and give critical appraisal of the findings in such a way as to give a true picture of the internal and external validity of the clinical trial.
First, the accuracy and external validity of the prediction models should be tested in contemporary cohorts of patients.
Although there would seem to be limited, external validity in extrapolating these study findings to the Caribbean given that its study population had a 25% prevalence of vasectomy and was constituted of mostly professional, Caucasian men, the study findings are actually relevant for the area in a number of ways.
It has external validity if one can credibly extrapolate the findings to the real policy problem of interest.
which lends some support to the external validity of our analysis of the return-to-work program.

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