There is growing pressure within the scientific community for scientists to participate in public engagement of science (PES) activities. As such, science communication scholars have worked to identify factors that predict a scientist's intention to participate in PES activities. One factor that has not been explicated is the role of experience performing PES activities in the past on one's future behavioral intentions. Using an augmented theory of planned behavior, we examine how one's experience participating in a question-and-answer forum on the popular website Reddit affected scientists' willingness to participate in a future PES activity.