formal validity - definitie. Wat is formal validity
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Wat (wie) is formal validity - definitie

EXTENT TO WHICH A CONCEPT, CONCLUSION OR MEASUREMENT IS WELL-FOUNDED AND CORRESPONDS ACCURATELY TO THE REAL WORLD
Validity (psychometric); Statistical validity; Reliability and validity; Validity and reliability

Formal (university)         
FORMAL UNIVERSITY DINNER EVENT IN COMMONWEALTH COUNTRIES
Formal Hall; Formal hall; Second hall; Second Hall
Formal hall or formal meal is a meal held at some of the oldest universities in the United Kingdom and the Republic of Ireland (as well as some other Commonwealth countries) at which students usually dress in formal attire and often gowns to dine. These are held commonly in the colleges and halls of Oxford, Cambridge,Meals & Formal Hall, Trinity Hall, Cambridge, UK.
valid         
WIKIMEDIA DISAMBIGUATION PAGE
ValidIty; Validities; Validly; Scientific validity; Valid; N-valid; N-validity; Validity (disambiguation)
a.
1.
Efficacious, efficient, sound, weighty, powerful, conclusive, logical, cogent, good, just, solid, important, grave, sufficient, strong, substantial.
2.
(Law.) Having legal strength or force, efficacious, executed with the proper formalities, supportable by law or right, good in law.
Formal power series         
GENERALIZATION OF A POLYNOMIAL, WHERE THE NUMBER OF TERMS IS ALLOWED TO BE INFINITE, DEFINED ALGEBRAICALLY WITHOUT CONSIDERATION OF CONVERGENCE (SO THAT E.G. EVALUATION IS NOT ALWAYS DEFINED)
Formal Laurent series; Formal series; Non-commuting formal power series; Power series ring; Ring of formal power series; K((x)); R((x)); Ring of formal Laurent series; Formal power series ring; Magnus ring; Formal power serie; Formal power series over a semiring; Operations on formal power series
In mathematics, a formal series is an infinite sum that is considered independently from any notion of convergence, and can be manipulated with the usual algebraic operations on series (addition, subtraction, multiplication, division, partial sums, etc.).

Wikipedia

Validity (statistics)

Validity is the main extent to which a concept, conclusion or measurement is well-founded and likely corresponds accurately to the real world. The word "valid" is derived from the Latin validus, meaning strong. The validity of a measurement tool (for example, a test in education) is the degree to which the tool measures what it claims to measure. Validity is based on the strength of a collection of different types of evidence (e.g. face validity, construct validity, etc.) described in greater detail below.

In psychometrics, validity has a particular application known as test validity: "the degree to which evidence and theory support the interpretations of test scores" ("as entailed by proposed uses of tests").

It is generally accepted that the concept of scientific validity addresses the nature of reality in terms of statistical measures and as such is an epistemological and philosophical issue as well as a question of measurement. The use of the term in logic is narrower, relating to the relationship between the premises and conclusion of an argument. In logic, validity refers to the property of an argument whereby if the premises are true then the truth of the conclusion follows by necessity. The conclusion of an argument is true if the argument is sound, which is to say if the argument is valid and its premises are true. By contrast, "scientific or statistical validity" is not a deductive claim that is necessarily truth preserving, but is an inductive claim that remains true or false in an undecided manner. This is why "scientific or statistical validity" is a claim that is qualified as being either strong or weak in its nature, it is never necessary nor certainly true. This has the effect of making claims of "scientific or statistical validity" open to interpretation as to what, in fact, the facts of the matter mean.

Validity is important because it can help determine what types of tests to use, and help to make sure researchers are using methods that are not only ethical, and cost-effective, but also a method that truly measures the idea or constructs in question.