Glossary of Terms

Behavioral item—A word, phrase, or sentence that describes some aspect of behavior.

Cluster analysis—A statistical analysis that groups like objects or items.

Concurrent validity—The relationship between scores on an instrument and performance or effectiveness measured at about the same time the instrument was completed.

Construct—An abstract variable that cannot be directly measured.

Construct validity—The ability of the instrument to measure phenomena that are hypothesized to exist but for which we can have no direct measure.

Content validity—The degree to which the items are a representative and a comprehensive measure of the phenomenon in question.

Correlation coefficient—A number, resulting from statistical analysis, that ...

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