This article reports on the first results of a large-scale research programme that aims to define and circumscribe the construct of phraseological complexity and to theoretically and empirically demonstrate its relevance for second language theory. Within this broad agenda, the study has two main objectives. First, it investigates to what extent…

In recent second language (L2) research it has been proposed that unlike linguistic phenomena pertaining to internal interfaces, those at external interfaces pose greater difficulty to adult L2 learners and may not be fully acquired. It has further been pointed out that such problematic acquisition at the interface level should not be attributed…