Lenzings book is unique and compelling. The results of the study offer clear support to her hypotheses and have crucial repercussions not only for the theory and praxis of second-language teaching, but also for experimental and developmental psycholinguistics. This book deserves the serious attention of anyone active in these areas. * Gerard A.M. Kempen, Senior Research Fellow, Max Planck Institute for Psycholinguistics, the Netherlands * Clearly-explained theories form the foundation for innovative research techniques, which are brought together in coherent and consistent ways. Lenzing takes long-established insights and turns them into precise, testable claims that have the potential to be operationalised for other aspects of additional language development. * Howard Nicholas, Associate Professor of Applied Linguistics and Education, La Trobe University, Australia *