In this article, we present an approach to the automatic correction of preposition errors in L2 English. Our system, based on a maximum entropy classifier, achieves average precision of 42% and recall of 35% on this task. The discussion of results obtained on correct and incorrect data aims to establish what characteristics of L2 writing prove…

Examines the role of the computer in constructing, from rules, derived forms of Swedish morphology and a characterization of Swedish pronunciation. Computer rules are described that mimic generative morphophonemic rules that produce nominals, adjectives, and verbals, and phonological rules that represent their pronunciations. (Author/CB)

Describes the language learning program "Acquire," which is a sample of grammar induction. It is a learning algorithm based on a pattern-matching scheme, using both a positive and negative network to reduce overgeneration. Language learning programs may be useful as tutorials for learning the syntax of a foreign language. (Author/LMO)