This study examines the generalization of instruction in foreign language learning. A group of Japanese learners of English served as participants and received special instruction in the structure of genitive relative clauses. The participants were given a pre-test on combining two sentences into one containing a genitive relative clause wherein the relativized noun phrase following the genitive marker "whose" is either the subject, direct object, or object of preposition. Based on the TOEFL and the pre-test results, four equal groups were formed; three of these served as experimental groups, and one as the control group. Each experimental group was given instruction on the formation of only one type of genitive relative clause. The participants were then given two post-tests. The results indicated that the generalization of learning begins from structures that are typologically more marked genitive relative clauses to those structures that are typologically less marked, and not vice versa.
