Table 1. Definitions and summary statistics of variables used in generalized linear mixed models predicting citation rates of ecological research articles.

Metric	Definition	Average	Standard deviation	Median	Minimum	Maximum
Number of tweets	Number of individuals tweets and retweets associated with an article	5.7	14.2	2	0	343
Number of users	The number of individual Twitter accounts that sent tweets/retweets about an article	5.0	11.0	2	0	183
Twitter reach	The number of individual Twitter accounts that potentially viewed tweets associated with an article	14906	55096	2110	0	695914
Time since publication (days)	The number of days between the date on which an article was published and when citation data were collected	1089	337	1086	455	1904
Number of Web of Science citations	The number of articles indexed by Thompson-Reuters Web of Science that cite an article	11.9	12.9	8	0	154