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arXiv · 2306.08999

Voting Booklet Bias: Stance Detection in Swiss Federal Communication

Eric Egli·Noah Mamié·Eyal Liron Dolev·Mathias Müller
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Abstract

In this study, we use recent stance detection methods to study the stance (for, against or neutral) of statements in official information booklets for voters. Our main goal is to answer the fundamental question: are topics to be voted on presented in a neutral way? To this end, we first train and compare several models for stance detection on a large dataset about Swiss politics. We find that fine-tuning an M-BERT model leads to the best accuracy. We then use our best model to analyze the stance of utterances extracted from the Swiss federal voting booklet concerning the Swiss popular votes of September 2022, which is the main goal of this project. We evaluated the models in both a multilingual as well as a monolingual context for German, French, and Italian. Our analysis shows that some issues are heavily favored while others are more balanced, and that the results are largely consistent across languages. Our findings have implications for the editorial process of future voting booklets and the design of better automated systems for analyzing political discourse. The data and code accompanying this paper are available at https://github.com/ZurichNLP/voting-booklet-bias.

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Eric Egli, Noah Mamié, Eyal Liron Dolev, Mathias Müller. 2023-06-15. Voting Booklet Bias: Stance Detection in Swiss Federal Communication. https://arxiv.org/abs/2306.08999

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