Multi-level error annotation in learner corpora

Learner corpora – principled collections of learner language – provide interesting insights into the mechanisms by which a foreign language is acquired. For overviews over the current state of learner corpus research see Granger (2002, to appear), Nesselhauf (2004), and Pravec (2002). Learner corpora are used to test hypotheses in the theory of acquisition in two main ways. First