“…Machine-learning techniques are a dominant methodological element in citation sentiment studies. In addition to SVM (see also Hernández-Alvarez & Gómez, 2015;Kim & Thoma, 2015;Xu, Martin, & Mahidadia, 2013), notable examples include random forest (Abu-Jbara, Ezra, & Radev, 2013;Parthasarathy & Tomar, 2014), naïve Bayes (Butt et al, 2015;Sula & Miller, 2014), and neural network methods (Lauscher, Glavaš, Ponzetto, & Eckert, 2017). Within this category, SentiWordNet, a lexical resource for opinion mining that is partly based on a semisupervised machine-learning method, has also been used in a number of studies (Goodarzi, Mahmoudi, & Zamani, 2014;Sendhilkumar, Elakkiya, & Mahalakshmi, 2013).…”