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Wang, Wenting – English Language Teaching, 2009
The present paper generally reviews the history of second language (L2) researchers' efforts in an attempt to find such an index and the possible reasons for the difficulties in establishing the developmental index from both the theoretical and the empirical viewpoints. Two contradictory views--interlanguage theory and emergentism--can finally be…
Descriptors: Interlanguage, Indexing, Indexes, Linguistic Theory