A Reliability Induction and Reliability Generalization Study of the Cage Questionnaire

Alan L. Shields · John C. Caruso

103 citations0/0 files storedEducational and Psychological Measurement

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Psychometric Methodologies and Testing Substance Abuse Treatment and Outcomes Health Education and Validation

Abstract

The CAGE is a commonly used alcohol screening instrument. Although considerable work has been done on the validity of CAGE scores, relatively little information is available on their reliability. Reliability induction and generalization studies were performed for the CAGE. Of the 259 studies available for analysis, only 19 (7.3%) contained reliability information for the sample scores. Thirteen (5.0%) and 227 (87.6%) articles made what are designated as reliability induction by report and reliability induction by omission. The median internal consistency reliability across 22 samples was .74, with a range of .52 to .90. Sample age was the only identified sample characteristic that demonstrated a statistically significant relationship with CAGE score reliability.

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