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Authorship attribution based on a probabilistic topic model
Auteur(s)
Date de parution
2013
In
Information Processing and Management
Vol.
49
No
1
De la page
341
A la page
354
Résumé
This paper describes, evaluates and compares the use of <i>Latent Dirichlet allocation</i> (LDA) as an approach to authorship attribution. Based on this generative probabilistic topic model, we can model each document as a mixture of topic distributions with each topic specifying a distribution over words. Based on author profiles (aggregation of all texts written by the same writer) we suggest computing the distance with a disputed text to determine its possible writer. This distance is based on the difference between the two topic distributions. To evaluate different attribution schemes, we carried out an experiment based on 5408 newspaper articles (<i>Glasgow Herald</i>) written by 20 distinct authors. To complement this experiment, we used 4326 articles extracted from the Italian newspaper <i>La Stampa</i> and written by 20 journalists. This research demonstrates that the LDA-based classification scheme tends to outperform the Delta rule, and the <i>Χ</i><sup>2</sup> distance, two classical approaches in authorship attribution based on a restricted number of terms. Compared to the Kullback–Leibler divergence, the LDA-based scheme can provide better effectiveness when considering a larger number of terms.
Identifiants
Type de publication
journal article
