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Affective News: The Automated Coding of Sentiment in Political Texts
Abstract
An increasing number of studies in political communication focus on the “sentiment” or “tone” of news content, political speeches, or advertisements. This growing interest in measuring sentiment coincides with a dramatic increase in the volume of digitized information. Computer automation has a great deal of potential in this new media environment. The objective here is to outline and validate a new automated measurement instrument for sentiment analysis in political texts. Our instrument uses a dictionary-based approach consisting of a simple word count of the frequency of keywords in a text from a predefined dictionary. The design of the freely available Lexicoder Sentiment Dictionary (LSD) is discussed in detail here. The dictionary is tested against a body of human-coded news content, and the resulting codes are also compared to results from nine existing content-analytic dictionaries. Analyses suggest that the LSD produces results that are more systematically related to human coding than are results based on the other available dictionaries. The LSD is thus a useful starting point for a revived discussion about dictionary construction and validation in sentiment analysis for political communication.
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Metadata
- Authors
- Young, L., & Soroka, S.
- Affiliations
- University of Pennsylvania (US)
- McGill University (CA)
- Corresponding author
- Soroka, Stuart
- ORCID
- Soroka, Stuart
- Venue
- Political Communication
- Publisher
- Informa UK Limited
- Published
- 2012-04
- Volume
- 29
- Issue
- 2
- Pages
- 205-231
- ISSN
- 1058-4609 (ISSN-L)
- 1091-7675
- OpenAlex
- W2072514260
- Semantic Scholar
- fa26c8c77f34e2f500af22f8dbb643fb7654b585
- Cited by
- 609
- References
- 94
- Citations by year
- 2026: 35 · 2025: 46 · 2024: 55 · 2023: 60 · 2022: 53 · 2021: 82 · 2020: 68 · 2019: 56 · 2018: 42 · 2017: 32 · 2016: 19 · 2015: 20 · 2014: 12 · 2013: 26 · 2012: 2
- FWCI
- 19.21
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Political Communication (publishedVersion)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Sentiment Analysis and Opinion Mining
- Social Sciences › General Social Sciences › Computational and Text Analysis Methods
- Social Sciences › Communication › News Media Framing and Political Communication
- Keywords
- sentiment analysis, lexicon-based sentiment analysis, political news, computational text analysis
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