In response to Ellis (2002), which resurrects the notion that language acquisition consists of frequency-based abstraction of regularities from input, this article suggests Ellis ignores fundamental and well-known problems, including the poverty of the stimulus, cases of instantaneous acquisition, and evidence for innate knowledge. (Author/VWL)

Discusses interlanguage development in terms of three questions: (1) What requirements do learners impose on their own interlanguage output? (2) What linguistic knowledge concerning the fulfillment of their requirements do learners have stored in their memories? and (3) What linguistic forms do learners actually use in their interlanguage output,…

Proposes that foreign language teaching can operate as a factor in the formation of interlanguage-specific rules either (1) by presenting the learner with foreign language material which deviates from target norms, or (2) indirectly by triggering off psycholinguistic processes, which in turn lead to interlanguage-specific rule formation. (EKN)