TABLE 1.

Definitions of Measures Used in Psychometric Analyses of the Columbia–Suicide Severity Rating Scale^a

Measure	Definition
Convergent validity	The covariance between scores from assessment instruments that measure the same or similar constructs
Divergent validity	The degree to which scores from an instrument are not related to scores on unrelated constructs
Predictive validity	The extent to which a score on the instrument predicts an outcome
Incremental validity	The degree to which data from a new instrument increase power, sensitivity, specificity, and predictive efficacy of judgments beyond those from comparable instruments
Sensitivity	The probability that a subject with an event will be so identified by the assessment instrument
Specificity	The probability that a subject without an event will be so identified by the assessment instrument
Sensitivity to change	The degree to which data from an instrument reflect small changes in the targeted construct
Internal consistency	The magnitude of covariance between items of multi-item measures, reflecting their conceptual integrity

^aDefinitions are based on Haynes et al. (33).