“…Research in automated assessment of students' writing, both native and non-native, is increasingly moving beyond traditional models that emphasize English conventions, sophistication of vocabulary, and organization (Attali and Burstein, 2006). Assessing aspects of content is a rapidly growing research topic, including evaluation of arguments, of the writer's use of information from source materials, of the coherence of the essay, among others (Ghosh et al, 2016;Persing and Ng, 2015;Stab and Gurevych, 2014;Song et al, 2014;Somasundaran et al, 2014;Gurevich and Deane, 2007). Use of metaphor is another aspect of language use that goes beyond grammar and mechanics; recent research suggests that use of metaphor differs with proficiency (Beigman Klebanov et al, 2013), including in non-native writing (Littlemore et al, 2013).…”