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Correlation - Psychometric Glossary

Defined as the relationship between two things, expressed as a number. Two identical things would be given a correlation of +1.0, to things that are not related at all would have a correlation of 0.0, and two completely opposite items would have a correlation of -1.0. In psychometrics, correlation is used to express the validity between a test and the criterion measure (usually job performance).

See also:

Psychometric SocietyRelationship Test Items, Rorschach Inkblot Test

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