Sexual Experiences and Risk Behavior Assessment Schedule

This scale is used to ascertain the number of unprotected vaginal and anal intercourse occasions (i.e. without condom use) by partner type (main versus non-main partners), number of partners, and gender of partners for the 3 months prior to each assessment, using timeline-followback type cues for recall. The SERBAS is a widely used sexual risk behavior assessment with good evidence of reliability and validity among both injection drug users and women at high risk for HIV, among other groups.