Morphological variability and the source of these errors have been intensely debated in SLA. A recurrent finding is that postpuberty second language (L2) learners often omit or use the wrong affix for nominal and verbal inflections in oral production but less so in written tasks. According to the missing surface inflection hypothesis, L2 learners…

Supports and expands upon S. P. Corder's theory that all the utterances of a language learner are well-formed and appropriate. (PMP)

Three studies investigated the comprehension of sentences containing the focus particle "only" by children and adults. Contrary to previous findings, two of the studies found that young children made errors predominantly by failing to process contrast information rather than errors in which they failed to use syntactic information to…

One of the several causal mechanisms for errors made by adult second language learners is interference from the native language. This paper attempts to account for the cognitive nature of interference by proposing two psycholinguistically based principles that will explain various types of production and perception errors made of second language…

This is a study of the kinds of processes involved in learning the meaning of individual lexical items, and in particular how the acquisition of lexical meaning is related to the cognitive structuring of events on the one hand and the ability to produce syntactic paraphrases of a word's meaning and other related constructions on the other. It is…