To date, most Sexual assault research has focused on specific perpetrator tactics, including verbal coercion, substance-related Incapacitation, and force. Responding to recent calls to assess a broader range of nonconsensual sexual experiences, we examined the occurrence and outcomes of Sexual assault without warning - when a perpetrator "just does" a behavior without giving a chance to say "no." Participants were 850 college students (M���=���19.70; 70% cisgender women, 28% cisgender men, 2% transgender/gender expansive), including 38% (���=���325) who reported Sexual assault since age 14. Among these survivors, 72% reported Sexual assault without warning, including 18% for whom this was the only tactic experienced. Sexual assault without warning was most often used to obtain nonconsensual sexual contact (23% of the sample) but also attempted (11%) and completed penetration (13%). Relative to no such experience, Sexual assault without warning was associated with more severe posttraumatic stress, depression, and anxiety, but fewer past-month drinks per week. Although more alcohol use and related consequences were better predicted by incapacitated Sexual assault, Sexual assault without warning was consistently associated with mental health problems. Findings support the integration of this tactic into Sexual assault assessments for college students of diverse gender and sexual identities.
