Published online by Cambridge University Press: 24 July 2013
This article considers the acquisition of three English syntax–discourse interface constructions: Topicalization, Focus Fronting and Left Dislocation. We use data from Basque–Spanish bilinguals learning English as a third language (L3) as a test case for the Interface Hypothesis (IH, Sorace, 2011). The IH has made specific predictions about second language (L2) acquisition and such predictions can be extrapolated to L3 on the basis of interface delay explanations. Thirty contexts and embedded test sentences with and without pronouns were used; participants had to rate the acceptability of each audio stimulus sentence in the context on a seven-point scale. We tested Basque–Spanish bilinguals dominant in Basque (n = 23), Basque–Spanish bilinguals dominant in Spanish (n = 24), Spanish L2 English learners (n = 39) as well as native English speakers (n = 24). Findings provide evidence against current L3 acquisition models and potential arguments for both cumulative enhancement as well as cumulative inhibition as possible processes in L3 acquisition.
The two authors gratefully acknowledge the Ikerbasque Foundation visiting researcher fellowship, whose funding allowed us to undertake the research described in this article. The second author gratefully acknowledges funding from the following research grants: IT-311-10 from the Basque Government, UFI 11/06 from the University of the Basque Country UPV/EHU and CSD2007-00012 from the Spanish Ministry of Education. We are extremely grateful to the participants in this test, and to Raquel Fernández Fuertes, Ainara Imaz Agirre and Cristóbal Lozano for recruiting participants. Thanks go to William Davies, Paula Kempchinsky and Christine Shea for sharing their native intuitions with us in the piloting of the test items and to Jorge González Alonso for the statistical analyses. Finally, we thank two anonymous reviewers and the editor for their useful suggestions on how to improve the article.