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V

validity

A truthful or factual condition; a logical argument; the evidence that the inferences drawn from test results are accurate.

Venn diagram

A mapping technique using overlapping circles showing features either unique or common to two or more concepts.

viewpoint

The stance or vantage point from which a story is narrated.

visual aid

An instructional device, such as a chart, map, diagram, cutaway or overlay, that helps a reader to comprehend information.

voice

In many languages, a syntactic pattern that indicates the verb-subject relationship; the principal voices in English and many other languages are active and passive.