1. Presence of TE original articles in Academic and Social Platforms
We first obtained a graphical representation of how TE original articles have evolved from 2012 to 2018 in different academic and social platforms (Figure 1). The results show the percentage of documents with at least one citation or mention. Concerning WoS, the percentage of TE documents exceeds 85.00% from 2012 to 2017. The nearness of 2018 data to the present time explains the result of WoS citations in that year (40.93%) when these metadata are not already collected. The role of TE in Twitter, Mendeley readers and Altmetric Attention Score shows an upward trend from the beginning of the period studied; in this sense, the percentage of TE documents with at least one mention in the reference manager Mendeley was close to the 50% in 2017. In contrast with it, the impact of TE research was less than 10% in terms of News, Patents and Facebook mentions for the whole period evaluated.
The behaviour of TE can be organised in three different evolutive patterns. First, the percentage of TE original articles mentioned in WoS exceeds the 80% from 2012 to 2017, suggesting the importance of traditional scores for this community; an accentuate decrease in 2018 is due to citation count was not already performed in the moment of the study. Second, a group of three variables (Number of Mendeley Readers, Altmetric Attention Score and Twitter mentions) follow a similar trend, gathering more than 25% of TE original articles mentioned in them. In this case, the Number of Mendeley Readers achieve almost 50% of mentions of TE original articles in 2017, suggesting the important role of this bibliographic database for TE researchers. Third, the presence of TE original articles is less notable in platforms such as Facebook, News and Patents since the obtained results are under 10%.