Interlanguage -- Editorial page -- Title page -- LCC data -- Table of contents -- Acknowledgements -- Introduction -- Chapter 1. Enduring questions from the Interlanguage Hypothesis -- Introduction -- Selected, interrelated themes originating in Selinker (1972) -- Two questions that follow from Selinker (1972) -- Relevance of the interlanguage hypothesis to the present -- Conclusion -- References -- Chapter 2. Rediscovering prediction -- Introduction -- Predictions in light of some empirical work -- Relevance to the latent psychological structure -- Limits on predictability -- Multilingualism -- Idiosyncrasy in forms -- Idiosyncrasy in meanings -- Conclusion -- Acknowledgments -- References -- Chapter 3. From Julie to Wes to Alberto -- Introduction -- Inter-learner and intra-learner differential success -- 'Fossilization' (Selinker, 1972) -- Intra-learner differential failure: Selective fossilization -- Selective fossilization of discourse properties -- Idiosyncrasy and theoretical paucity -- The Selective Fossilization Hypothesis -- Theoretical controversies and the future of fossilization research -- Conclusion -- Acknowledgments -- References -- Chapter 4. Interlanguage, transfer and fossilization -- Introduction -- Generative approaches to second language acquisition -- Linguistic competence and interlanguage -- L1 transfer -- Fossilization -- Beyond L2 acquisition: Language contact and change -- From interlanguage to new language varieties -- Incomplete acquisition and age effects -- Conclusion -- References -- Chapter 5. The limits of instruction -- Introduction -- First, some definitions -- Language -- Formal Instruction -- The evidence for limited instructional effects -- Staged development -- Poverty of the stimulus -- Yes, but... -- So, why these non-effects? Against "rules" -- One more "yes, but..." -- Conclusion -- Acknowledgements.

References -- Chapter 6. Documenting interlanguage development -- Introduction -- Functional approaches to interlanguage analysis -- Interlanguage temporality -- Interlanguage development, choice, and interpretation in L2 pragmatics -- Conventional expressions: Interlanguage grammar in so-called formulas -- Conclusion -- References -- Chapter 7. Methodological influences of "Interlanguage" (1972) -- Introduction -- What counts as data? -- Data in historical context -- Grammaticality judgments -- Nonsense data -- Early research using nonsense syllable and words -- Current studies -- Artificial language studies -- Conclusion -- References -- Chapter 8. Trying out theories on interlanguage -- Introduction -- The theme of description vs. explanation in Selinker (1972) -- A forewarning: The complexity of description-theory relationships -- The development of L2 negation: Stages and sequences in the 1970s and 1980s -- The variationist approach (1980s-1990s) -- Negation in universal grammar perspective since the 1990s -- Also during the 1990s: Italian negation in the basic variety -- Onto the future? Usage-based approaches to English negation -- Conclusion -- Looking forward -- References -- Chapter 9. Another step to be taken - Rethinking the end point of the interlanguage continuum -- Introduction -- Five enduring contributions of the interlanguage article -- The separation of teaching from learning -- The definition of acceptable data -- The existence of a separate linguistic system -- Fossilization -- Distinguishing linguistic units from psychological units -- An enduring controversy, too -- Another step to be taken -- Development as a transitional state changing towards the TL -- (Idealized) monolingual native speaker -- The ultimate yardstick of linguistic success -- A teleological view of language.

Reconciling the non-teleological nature of language with the normativity of language teaching -- Conclusion -- References -- Chapter 10. Interlanguage 40 years on -- Introduction -- Three major themes -- Historical understanding -- "Interlanguage as a system in its own right" (Selinker 1972) -- The creation of a "deep interlanguage semantics" -- Peroration: Developing "doubt as a critical skill" -- "Tell me: How can i transfer my native language English patterns to someone else's French? There must be another system involved." -- Conclusion -- Acknowledgements -- References -- Name index -- Subject index.