RT info:eu-repo/semantics/bookPart T1 Challenges in the annotation of article errors in Spanish learner texts A1 Valverde Ibáñez, Pilar AB Annotating learner texts with article error information is a difficult task. To identify which are the main difficulties for annotators, we carry out an annotation experiment in Spanish texts written by Japanese learners. Two expert and two non-expert raters annotate 300 noun phrases containing a definite, indefinite or zero article. We calculate inter-annotator agreement and analyse the sources of disagreement. We find article usage governed by pragmatic factors causes disagreement the most, while lexico-semantic factors are the most reliable. Finally, a learner corpus sample of 30,000 words is annotated with a revised version of the annotation scheme. PB Asia-Pacific Society for Computers in Education SN 978-4-9908014-2-7 YR 2014 FD 2014 LK https://uvadoc.uva.es/handle/10324/78031 UL https://uvadoc.uva.es/handle/10324/78031 LA eng NO Liu, C.-C. et al. (Eds.), International Conference on Computers in Education, Nara, Asia-Pacific Society for Computers in Education, p. 24-34 NO Producción Científica DS UVaDOC RD 07-oct-2025