The following commentary presents an overview of earlier studies of discourse functions and syntactic complexity as well as recent investigations that focus on interaction and measures of syntactic and lexical complexity in learners' output in traditional classrooms and computer-mediated environments. Recent studies emphasize the need for better…

Identifies issues specific to syntactic parsing for intelligent computer-assisted language instruction (ICALI), including applications, types of input errors, characteristics of natural language, and output. Presents a general overview and assessment of grammar formalisms and parsing strategies in relation to ICALI. (Author/LS)