Theoretical assumptions and consequences of the Markedness Differential Hypothesis (MDH) are compared with the Contrastive Analysis Hypothesis, and empirical evidence favoring the former is reviewed. Pedagogical implications of the MDH, a strategy for interlanguage-intervention, and several problems revealed in the literature are discussed. (MSE)

Three studies comparing the respective roles of interlanguage universals and natural language transfer in determining learners' judgments of grammaticality used college students of French in their second, third, and fourth semesters as subjects. In the first experiment, the subjects were exposed to both grammatical and four types of ungrammatical…

Tests the universality hypothesis of language acquisition by asking young monolingual English and Japanese children to verify true affirmatives, false affirmatives, false negatives, and true negatives. The hypothesis was not supported in the case of Japanese-speaking children. A theory of cross-linguistic language acquisition is proposed.…