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Purpose Suicidal ideation (SI) is a serious public health concern among youth and young adults in the USA. It is critical to evaluate potential risk and protective factors associated with SI among young adults to develop prevention strategies that target novel mechanistic outcomes. Design/methodology/approach This study sought to evaluate the association between negative social exchange (NSE) and SI via the framework of the interpersonal theory of suicide. Participants were a diverse sample of N = 243 college students, with a mean age of 19.98 years (SD = 3.15). Participants were predominantly female (68.3%) and Hispanic/Latinx (39.5%), white (21.4%) or multiracial/multiethnic (24.3%). Participants completed survey measures to assess each of the constructs of interest. Findings Results indicated a significant indirect effect from NSE to SI via perceived burdensomeness, but not thwarted belongingness. Originality/value While individual-level interventions target emotional reactivity and managing emotional responses, larger public health–focused interventions on campus may wish to target reductions in NSE on campus. Future work should evaluate these associations using longitudinal study designs to further evaluate the statistical models.

Abstract. Background: Suicide prevention gatekeeper training programs offer a unique opportunity to increase knowledge about suicide prevention, enhance risk identification, and reduce suicide-related stigma. Aims: This study evaluated the efficacy of an online suicide prevention gatekeeper training program in a randomized trial. Method: Participants were US college students ( N = 388). Participants (69.3% women) had a mean age of 19.01 years and identified primarily as Hispanic/Latinx (52.1%) and non-Hispanic White (22.4%). Participants completed pre- and posttest surveys and were randomly assigned to either the ASK About Suicide to Save a Life (AS + K?) suicide prevention gatekeeper training program or an information-only comparison intervention. Results: Participants in the AS + K? condition reported significantly greater gatekeeper preparedness and self-efficacy, and lower stigmatized attitudes at posttraining, as compared with those in the comparison condition. There were no significant differences in likelihood of using gatekeeper skills or suicide-related knowledge across groups. Limitations: This short-term study was not able to assess behavioral change resulting in use of gatekeeper skills over time. Conclusions: Completion of gatekeeper training resulted in increases in preparedness and self-efficacy for engaging in gatekeeper behaviors, as well as a reduction in suicide-related stigma. Despite small intervention effects, the online AS + K? training appears to be a promising program.