A total of 22 subjects participated to the recordings of the speech data: one native speaker for each language, and 10 learners for each language.
corpus-based studies can be used to determine how some morpho-syntactic phenomena are acquired in English as a foreign language (see for example the project English Profile, Hawkins and Buttery 2009), how students' pronunciation of L2 can be influenced by his L1 (I-PFc project, Racine et al.