Paper: Lexical Chaining for Measuring Discourse Coherence Quality in Test-taker Essays

ACL ID C14-1090
Title Lexical Chaining for Measuring Discourse Coherence Quality in Test-taker Essays
Venue International Conference on Computational Linguistics
Session Main Conference
Year 2014
Authors

This paper presents an investigation of lexical chaining (Morris and Hirst, 1991) for measuring discourse coherence quality in test-taker essays. We hypothesize that attributes of lexical chains, as well as interactions between lexical chains and explicit discourse elements, can be harnessed for representing coherence. Our experiments reveal that performance achieved by our new lexical chain features is better than that of previous discourse features used for this task, and that the best system performance is achieved when combining lexical chaining features with complementary discourse features, such as those provided by a discourse parser based on rhetorical structure theory, and features that reflect errors in grammar, word usage, and mechanics.