Mode Effects' Challenge to Authorship Attribution

Haining Wang, Allen Riddell, Patrick Juola

Sentiment Analysis, Stylistic Analysis, and Argument Mining Long paper Paper

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Abstract: The success of authorship attribution relies on the presence of linguistic features specific to individual authors. There is, however, limited research assessing to what extent authorial style remains constant when individuals switch from one writing modality to another. We measure the effect of writing mode on writing style in the context of authorship attribution research using a corpus of documents composed online (in a web browser) and documents composed offline using a traditional word processor. The results confirm the existence of a "mode effect" on authorial style. Online writing differs systematically from offline writing in terms of sentence length, word use, readability, and certain part-of-speech ratios. These findings have implications for research design and feature engineering in authorship attribution studies.
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