When Readers were compared with Community Members, postdocs and assistant professors had greater odds of being Community Members than did full professors (z > 3.75, p < 0.001), associate professors (z > 2.60, p < 0.01), or graduate students (z > 2.10, p < 0.04). Pairwise relationships between the other seniority categories were not statistically significant. Furthermore, an increase in the number of publications and frequency of RIMS use increased the odds of a researcher being a Community Member rather than a Reader (z > 3, p < 0.003; see Fig 2). Finally, switching from Engineering to Life Sciences increased the odds of a researcher becoming a Community Member rather than a Reader (z = 2.20, p = 0.03).