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 ?
One content validity concern with the MSC scale is that the instrument also measures motives for participation.
We derived content validity from three sources: the research literatures cited and described by Walker et al.
In Flierman, Groenewegen, and Stokx (1991), we applied the measure presented here to more precise diagnostic information, and could indeed show content validity with few exceptions, following the rules previously described.
Clinicians using the tool should also be aware that evidence for the content validity of the PRWHE is not fully established.
The two methods of content validity rate and content validity index were used in the quantitative method.
Content validity refers to the ability of the items within the instrument to measure the concept that it is intended to measure (PER, Lackey, & Sullivan, 2003).
Evaluations of these data continue to support the stability and content validity of NLBCT in measuring the proficiency of applicants in literary braille.
Content validity was determined using experts' judgement of instrument items according to a four-point rating scale; construct validity was determined through paired comparison analysis methods within a subjective judgement model.
The revised 60-items Likert scale was reviewed for face and content validity by a second group of reviewers including five social work faculty members.
Mplus software (Muthen & Muthen, Los Angeles, California) [9] was used to examine the factor structure and content validity of the item responses.
Three types of validity were analyzed: face, content validity and criterion validity.
When a measure is created, psychometric testing is required, and the first step is to study the content validity of the measure.
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