The data that provide the foundation for this investigation of second language (L2) slips of the tongue stem from a corpus originally compiled in 1984 to investigate the use of compensatory strategies by Dutch learners of English. Poulisse defines a slip or speech error as a performance error stemming from a temporary processing problem rather than a competence error reflecting an incomplete or incorrect L2 system. The book's focus is the extent to which research on L2 slips (morphological, phonological, and syntactic) can shed light on speech-production processing for the development of bilingual models of speech production.