Background Race and gender disparities remain a challenge in science, technology, engineering, and mathematics (STEM) education. We introduce campus racial climate as a framework for conceptualizing the role of racial microaggressions (RMAs) as a contributing factor to the lack of representation of domestic students of color in STEM programs on college campuses. We analyze the experiences of students of color in STEM majors who have faced RMAs at the campus, academic, and peer levels. We draw from an online survey of more than 4800 students of color attending a large public university in the USA. The STEM major subsample is made up of 1688 students of color. The study estimates a series of Poisson regressions to examine whether one’s race, gender, or class year can be used to predict the likelihood of the regular occurrence of microaggressions. We also use interview data to further understand the challenges faced by STEM students of color. Results The quantitative and qualitative data suggest that RMAs are not isolated incidents but are ingrained in the campus culture, including interactions with STEM instructors and advisers and with peers. Students of color experience RMAs at all three levels, but Black students in the STEM majors are more likely to experience RMAs than other students of color in the sample. Conclusions Our study demonstrates the need for campus officials, academic professionals, faculty members, and students to work together to address racism at the campus, academic, and peer levels. Additionally, STEM departments must address the impacts of the larger racial campus culture on their classrooms, as well as how departmental culture reinforces racial hostility in academic settings. Finally, our findings reveal the continued presence of anti-Black racism in higher education.

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This study employs multi-level and mixed-methods approaches to examine how structural violence affects the health of low-income, single Black mothers. We use multilevel regression models to examine how feeling “trapped” in racially segregated neighborhoods with high levels of violence on the South Side of Chicago affects mothers’ ( N = 69) reports of posttraumatic stress disorder and depressive symptoms. The relationship between feeling “trapped” and variations in expression of mRNA for the glucocorticoid receptor gene NR3C1 using microarray assays was also examined. The regression models revealed that feeling “trapped” significantly predicted increased mental distress in the form of PTSD, depressive symptoms, and glucocorticoid receptor gene regulation. The mothers’ voices revealed a nuanced understanding about how a lack of financial resources to move out of the neighborhood creates feelings of being “trapped” in dangerous situations.