Analyzing the Impact of Prevalence on the Evaluation of a Manual Annotation Campaign

Karen Fort (1) , Claire François (2) , Olivier Galibert (3) , Maha Ghribi (2)

1 LIPN - Laboratoire d'Informatique de Paris-Nord
2 INIST - Institut de l'information scientifique et technique
3 LCM - Laboratoire commun de métrologie LNE-CNAM

This article details work aiming at evaluating the quality of the manual annotation of gene renaming couples in scientific abstracts, which generates sparse annotations. To evaluate these annotations, we compare the results obtained using the commonly advocated inter-annotator agreement coefficients such as S, κ and π, the less known R, the weighted coefficients κω and α as well as the F-measure and the SER. We analyze to which extent they are relevant for our data. We then study the bias introduced by prevalence by changing the way the contingency table is built. We finally propose an original way to synthesize the results by computing distances between categories, based on the produced annotations.

Mots clés: Manual annotation evaluation; Inter-annotator agreement; Prevalence

Domaines: Traitement du texte et du document

Karen Fort, Claire François, Olivier Galibert, Maha Ghribi. Analyzing the Impact of Prevalence on the Evaluation of a Manual Annotation Campaign. International Conference on Language Resources and Evaluation (LREC), May 2012, Istanbul, Turkey. ⟨hal-00709174⟩