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The psychometric properties of two pathological gambling (PG) screening instruments, the South Oaks Gambling Screen (SOGS) and the Massachusetts Gambling Screen—DSM-IV subscale (MAGS), were explored in a sample of college students (N = 159). Participants completed the two screening instruments, a diagnostic interview for PG, the Gambling—Timeline Followback (G-TLFB), Gambling Self-E ficacy Questionnaire (GSEQ), and the Hopkins Symptom Checklist (HSCL). Both screening measures were found to have adequate internal consistency and were highly correlated with each other and the diagnostic interview. The screening measures demonstrated convergent and discriminant validity. Using the diagnostic interview as the criterion measure, the SOGS demonstrated better sensitivity in identifying PG college students than the MAGS. The MAGS demonstrated better specificity in identifying non-PG college students than the SOGS. The results of this study suggest that although neither measure is perfect in identifying PG college students, the SOGS is a more appropriate measure for screening purposes. [ABSTRACT FROM AUTHOR]