Pairwise comparisons of seniority groups for the Support Evaluation scale showed that graduate students, postdocs, and assistant professors had significantly higher ratings for this scale than did full and associate professors. Graduate students, postdocs, and assistant professors also rated the Enjoyment scale significantly higher than did full professors (see Fig 3). These results can be explained by the fact that most full and associate professors have tenure, and hence have less pressure to facilitate their own evaluations.