-
Universal Grammar: Language acquisition means linguistic competence. Competence in native language means innate knowledge is genetically embedded.
-
Linguistics Across Cultures: Contrastive Analysis. Comparing and Contrasting the L1 and L2
-
Article: "The significance of learners' errors" : Error Analysis, A learners errors are not "bad habits," but to be sources of insight into the learning process.
-
Interlanguage: the intermediate state of language learning as it moves towards the target language.
-
Morpheme Order Studies: The sequence constituted a natural order for English L2 and English L1.
-
Systemic Linguistics: Analyzing language in terms of the interrelated systems of choices that are available for expressing meaning.
-
Functional Typology: Markedness Differential Hypothesis
-
Monitor Model: Five hypothesis of how L2 is acquired.
-
Information Organization: Utterance structure, interlanguage learner varieties, and developmental levels