Language educators find two kinds of errors in the interlanguages of language learners: developmental and interference. While developmental errors reflect a normal pattern of development common among all language learners, interference errors are caused by the learners' native languages. This paper deals with a number of die-hard types of…

The validity of the theory of crucial similarity in language interference is investigated. The theory proposes that when a first and a second language are structurally similar in some aspects, the second language learner will assume similarity in other aspects, causing interference. In this study, the German of first grade students whose teacher…

A review of the literature on child language reveals little research on overgeneralization in the speech of the bilingual child. Questions arise regarding (1) the existence of interlingual overgeneralizations, and (2) the possibility that monolingual deviations and bilingual code switching might be forms of overgeneralization. Because a model for…