To promote undergraduate education reform, teaching professional development (TPD) efforts aim to encourage instructors to adopt evidence-based practices. However, many instructors do not attend TPD. There may be many reasons for this, including low intrinsic motivation to participate in TPD. Psychologists have dealt with motivational barriers in educational contexts using psychosocial interventions, brief activities that draw on a rich history of psychological research to subtly alter key, self-reinforcing psychological processes to yield long-term intrinsic motivation and behavioral changes. Psychosocial interventions, for example, have been used to alter students' noncognitive attitudes and beliefs, such as attributions and mindset, which positively influence students' motivation and academic performance. Here, we propose that insights from research on psychosocial interventions may be leveraged to design interventions that will increase instructors' motivation to participate in TPD, thus enhancing existing pedagogical reform efforts. We discuss psychological principles and "best practices" underlying effective psychosocial interventions that could guide the development of interventions to increase instructors' motivation to attend TPD. We encourage new interdisciplinary research collaborations to explore the potential of these interventions, which could be a new approach to mitigating at least one barrier to undergraduate education reform.