Alexandra Cristea


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Combining Heterogeneous User Generated Data to Sense Well-being
Adam Tsakalidis | Maria Liakata | Theo Damoulas | Brigitte Jellinek | Weisi Guo | Alexandra Cristea
Proceedings of COLING 2016, the 26th International Conference on Computational Linguistics: Technical Papers

In this paper we address a new problem of predicting affect and well-being scales in a real-world setting of heterogeneous, longitudinal and non-synchronous textual as well as non-linguistic data that can be harvested from on-line media and mobile phones. We describe the method for collecting the heterogeneous longitudinal data, how features are extracted to address missing information and differences in temporal alignment, and how the latter are combined to yield promising predictions of affect and well-being on the basis of widely used psychological scales. We achieve a coefficient of determination (R2) of 0.71-0.76 and a correlation coefficient of 0.68-0.87 which is higher than the state-of-the art in equivalent multi-modal tasks for affect.


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Is Wikipedia Really Neutral? A Sentiment Perspective Study of War-related Wikipedia Articles since 1945
Yiwei Zhou | Alexandra Cristea | Zachary Roberts
Proceedings of the 29th Pacific Asia Conference on Language, Information and Computation

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WarwickDCS: From Phrase-Based to Target-Specific Sentiment Recognition
Richard Townsend | Adam Tsakalidis | Yiwei Zhou | Bo Wang | Maria Liakata | Arkaitz Zubiaga | Alexandra Cristea | Rob Procter
Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015)