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Qu'est-ce (qui) est extension of validity - définition

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

Group extension

GROUP FOR WHICH A GIVEN GROUP IS A NORMAL SUBGROUP

Extension problem; Extension (algebra); Split extension; Extension of a group; Central extension (mathematics)

In mathematics, a group extension is a general means of describing a group in terms of a particular normal subgroup and quotient group. If Q and N are two groups, then G is an extension of Q by N if there is a short exact sequence

https://en.wikipedia.org/wiki/Group_extension

University of Wisconsin–Extension

UW-Extension; UWEX; University of Wisconsin Extension; UW Extension; University of Wisconsin-Extension; UW–Extension; The University of Wisconsin–Extension; The University of Wisconsin–Extension (UW–Extension); University of Wisconsin–Extension (UW–Extension); The University of Wisconsin-Extension; The University of Wisconsin-Extension (UW-Extension); University of Wisconsin-Extension (UW-Extension)

The University of Wisconsin–Extension (UW–Extension) was the outreach arm of the University of Wisconsin System. It provides statewide access to university system's resources and research to Wisconsin residents of all ages.

https://en.wikipedia.org/wiki/University_of_Wisconsin–Extension

Extension (metaphysics)

THE PROPERTY OF STRETCHING OUT OR TAKING UP SPACE

Physical extension

In metaphysics, extension signifies both 'stretching out' (Latin: extensio) as well as later 'taking up space', and most recently, spreading one's internal mental cognition into the external world.

https://en.wikipedia.org/wiki/Extension_(metaphysics)

Wikipédia

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.

https://en.wikipedia.org/wiki/Validity (statistics)