Measuring college students' motives behind prepartying drinking: Development and validation of the prepartying motivations inventory

► Developed and validated the Preparty Motivations Inventory (PMI). ► Data were derived from two large unique samples of college students. ► EFA and CFA confirmed a 16-item, four factor measure. ► Good internal reliability, discriminant validity, and criterion-related validity. ► The PMI reveals unique motivations behind college students' prepartying behavior.