Table 4 Measures of variables.
From: The inverted U-shaped relationship between knowledge diversity of researchers and societal impact
Variables | Codes | Measures |
|---|---|---|
Dependent variable | ||
Societal impact | Tweets mentioned count | The number of mentions by Tweets |
Independent variable | ||
Interdisciplinary collaboration diversity | Subject count | The number of disciplines involved per publication |
Control variable | ||
Institution | Institution count | The number of research institutions involved per publication |
Author | Author count | The number of authors involved per publication |
Journal | Journal | If the journal is Nature, marked as 0; if Science, marked as 1 |
Time lag | Time lag | Time lag between altmetric data acquisition and paper publication (measured in days) |
Field | Field | If the publication relates to a main field, the corresponding variable is marked as 1 and vice versa |
