Foreign language learning contrasts with native language development in two key respects: It is unreliable and it is nonconvergent. At the same time, it is clear that foreign languages are languages. The fundamental difference hypothesis (FDH) was introduced as a way to account for the general characteristics of foreign language learning. The FDH…

Argues that Chomsky's theory of generative grammar provides a model for second language acquisition that meets the criteria of descriptive and exploratory adequacy in accounting for the language learning process. Illustrates this by presenting data on the acquisition of dative complements and dative questions in a passive context by second…