Table 3.
Mean differences in collaboration and publication characteristics, synthesis center articles vs. reference corpus.
| Variable | Synthesis center articles (n=1526) | Reference corpus (n=396,852) | Difference (t) |
|---|---|---|---|
| Number of authors | 5.19 | 4.92 | .27 (.23) |
| Number of addresses | 4.48 | 2.81 | 1.66 (22.2)*** |
| Number of references | 56 | 44.4 | 11.6 (21.8)*** |
| Proportion of topic weight removed as junk | 0.354 | 0.334 | .021 (8.31)*** |
| Count of tokens per document (after stop word removal) | 109.3 | 111.3 | 2.00 (2.35) |
| Publication year | 2006 | 2006.8 | .737 (6.03)*** |
* = p < .05; ** = p < .01; *** = p < .001