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 ?
technical and methodological quality of the supply of technical resources 15% -
The main observation from the risk of bias and methodological quality assessments is the many "unclear" scores, indicating that most items were not sufficiently reported, resulting in an unknown risk of bias (Figure 2).
The methodological quality of the studies was considered moderate and high-which reinforces the reliability and representativeness of the results of the analyzed populations.
Highlights among the study's findings include the positive assessment of the CPGs and MINSAL's commitment to prioritizing their development, as well as the improvements in methodological quality observed to date, due to the standardization of the development process.
3 stars) Braga 2016 [dagger] ** Braga 2015 ** DiRenzo 2015 ** Estrada 2009 ** Gimpel 2010 ** Gokaslan 2012 * Herz 2014 ** Sencan 2014 *** Szymanski 2012 ** Zareba 2014 ** Zee 2016 ** Study Methodological quality (high >7 stars) Braga 2016 [dagger] High Braga 2015 High DiRenzo 2015 Low Estrada 2009 Low Gimpel 2010 Low Gokaslan 2012 Low Herz 2014 Low Sencan 2014 Low Szymanski 2012 High Zareba 2014 High Zee 2016 Low [dagger] Excluded from meta-analysis due to patient overlap with Braga 2015.
The methodological quality of quantitative studies (ie, the risk of bias) will be assessed with respect to appropriateness of study design, process used in selecting participants, control for confounding factors, blinding of participants and/or personnel, including outcome assessors (researcher's role and influence), follow up length, withdrawals/losses to follow up and reasons for withdrawals, data collection and analysis methods.
6 This classification was used to assess the methodological quality of the included papers.
Systematic reviews and meta-analyses of home telemonitoring interventions for patients with chronic diseases: a critical assessment of their methodological quality.
Methodological quality of trials comparing hypothermia with normothermia Study Randomization Concealment Intention to Treat Bernard et al.
The specific purposes of the study were to f) investigate the overall characteristics of music interventions, 2) identify the methodological quality of research involving the use of music interventions, and 3) examine the effectiveness of music interventions on anxiety in patients requiring maintenance HD.
Critical evaluation of the studies that met our review criteria was guided by the COSMIN checklist (Consensus-based Standards for the selection of health status Measurement INstruments), a standardised tool recommended for evaluating the methodological quality of studies concerning measurement properties (Mokkink 2010, Terwee et al 2012).