Investigates whether the Wave Model of linguistic change can furnish a valid idealization for the patterning of variation in interlanguage systems and a scale for determining degree of naturalness. Data from 162 French-speaking adult learners were used to analyze the variability in the evolution of the English possessive determiners…

Analysis of data derived from an earlier study of Japanese-English interlanguage shows that discourse-pragmatic markedness conditions on the subject position combine with central aspects of a configurational syntax in the generation of sentential forms, creating a module interface distinct from the native or second language. (38 references)…