Examining how a documentary film can serve as an intervention to shift attitudes and behaviours around sexism in STEM.

"Picture a Scientist," a documentary featuring stories and research about bias in STEM, reached a large international audience. Yet, the extent to which this type of engaging media can impact gender bias remains unclear. In a unique collaboration between film creators and researchers, the current large-scale field studies explored whether "Picture a Scientist" functioned as an intervention and persuasive message targeting sexism in STEM. Study 1 found viewers who indicated more knowledge and stronger emotions, perspective-taking, and transportation after the film were more inspired to continue learning sexism in STEM and combating unfair treatment, suggesting the documentary engaged both classic and narrative persuasion processes. Employing a quasi-experimental design, Study 2 demonstrated that compared to those who had not watched the film (but intended to), participants who had viewed the film indicated higher awareness of gender bias, stronger intentions to address this bias, and participants in leadership reported stronger intentions to enact inclusive policies (for example, making it easier to report mistreatment). Our findings suggest that the use of this documentary may be a relatively low-cost and easily scalable online intervention, particularly when organizations lack resources for in-person workshops. These studies can help inform organizational trainings using this or similar documentaries.