Physicists' motivations and needs in informal physics

Physicists engage with the public to varying degrees at different stages of their careers. However, their public engagement covers many activities, events, and audiences, making their motivations and professional development needs not well understood. As part of ongoing efforts to build and support community in the informal physics space, we conducted interviews with physicists with a range of different experiences in public engagement. We use personas methodology and self-determination theory to articulate their public engagement motivation, challenges, and needs. We present our set of four personas: the physicist who engages in informal physics for self-reflection, the physicist who wants to spark interest in physics, the physicist who wants to provide diverse role models to younger students and inspire them to pursue a STEM career, and the physicist who wants to improve the relationship between scientists and the public. By developing this set of personas, we are expanding on the informal physics community's understanding of the motivations and needs of practitioners in this space. This work also informs the development of tailored resources for the Joint Network for Informal Physics Education and Research (JNIPER) program.