Giuliano Castiglia


Visualization of the Topic Space of Argument Search Results in
Yamen Ajjour | Henning Wachsmuth | Dora Kiesel | Patrick Riehmann | Fan Fan | Giuliano Castiglia | Rosemary Adejoh | Bernd Fröhlich | Benno Stein
Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing: System Demonstrations

In times of fake news and alternative facts, pro and con arguments on controversial topics are of increasing importance. Recently, we presented as the first search engine for arguments on the web. In its initial version, ranked arguments solely by their relevance to a topic queried for, making it hard to learn about the diverse topical aspects covered by the search results. To tackle this shortcoming, we integrated a visualization interface for result exploration in that provides an instant overview of the main aspects in a barycentric coordinate system. This topic space is generated ad-hoc from controversial issues on Wikipedia and argument-specific LDA models. In two case studies, we demonstrate how individual arguments can be found easily through interactions with the visualization, such as highlighting and filtering.