Examines the central characteristics of interlanguages that distinguish them from all other natural language systems. It is proposed that, since permeability presupposes an interlanguage norm which is relatively stable, we are forced to gather enough data to establish the overall level of linguistic competence of the learner. (Author/POP)

The French language competence of two groups of English-speaking pupils who are educated via French was investigated. Third and fifth grade English-speaking pupils were compared with French-speaking children of the same age. Results of the study are discussed. (Author/RM)

An analysis of speech samples collected from adult ESL students revealed recurring variants indicating that learners attempt to simplify the target language in several ways. A universal process of simplification in language learning is postulated to account for the recurrence of the same variants in different learner idiolects. (Author/KM)

A model of speech perception and production is suggested here which attempts to account for different rates of acquisition of perceptual and productive skill in the second language without assuming the existence of two separate second language grammars. (Author/KM)

It is argued here that childhood phonological errors systematically simplify the child's inventory of phonetic elements and strings. (Author/KM)