We thank the nearly 200 STEM GTAs who participated in this study. This research was not possible without their time and effort. We also acknowledge the contributions of the nine departments that encouraged their GTAs to participate in this research and that provided support for copying, distributing, and collecting the surveys. A draft of the paper was greatly enhanced by comments from Dr. Lacy Cleveland and manuscript reviewers at LSE. This research has IRB approval (Oregon State University, IRB 4107).