Chunk #14 — 2.0 METHODS — 2.3 Validating Measures

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A multidimensional assessment of the validity and utility of alcohol use disorder severity as determined by item response theory models.

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to 2). Number of lifetime antisocial personality disorder (ASPD) symptoms (range = 0 to 33) was calculated from a list of 33 symptom items used to operationalize conduct disorder and ASPD in the AUDADIS-IV. Initiation of drinking before age 15 was determined by self report to a question asking when the respondent first started drinking, not counting small tastes or sips.