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Excessive drinking in college leads to serious harms, but students who use protective behavioral strategies (PBS) avoid negative consequences by drinking in a safer manner. This study aimed to increase the content validity of the Serious Harm Reduction (SHR) subscale of the most widely used measure of PBS, the Protective Behavioral Strategies Scale (PBSS: Martens et al., 2005). An initial item pool was developed from literature on college student drinking, existing lists of drinking control strategies, and an online pilot survey of college students (N = 1,832). Items were also evaluated by focus groups of experts and members of the target population. Next, 1,376 students (57.9% women; Mage = 18.5 years; 86.3% White) completed questionnaires online. A subset (n = 170; 12.4%) completed a second survey 4-6 weeks later to examine test-retest reliability and criterion-related validity. The remaining students (n = 1,206) were divided into equal development and validation samples. Analyses included exploratory and confirmatory factor analysis of the development sample, factor structure replication, and gender invariance testing in the validity sample. Results of this process produced the PBSS-20, with an expanded SHR scale of eight items. The revised SHR scale demonstrated improved internal consistency and was associated with a broader range of alcohol-related negative consequences at follow-up. Given its focus on reducing serious harms, the SHR scale is arguably the most clinically relevant PBSS factor, and those who use this measure will benefit from the expanded breadth of SHR content and improved psychometric properties of the PBSS-20.

The Protective Behavioral Strategies Scale-20: Improved content validity of the Serious Harm Reduction subscale.