In this article, we challenge the notion that aptitude--operationalized as grammatical sensitivity as measured by the Words in Sentences section of the Modern Language Aptitude Test--is central to adult second language (L2) acquisition. We present the findings of a study on the acquisition of two properties of Japanese, head-final word order and…

This study presents the results of four experiments in the framework of processing instruction conducted with four language learner groups (Spanish, "n"?=?43; German, "n"?=?46; Russian, "n"?=?44; and French, "n"?=?48; discussed in that order). In each experiment, the processing problem was held constant (the…

In the present study, we examine the roles of 1) explicit information about language provided to learners prior to treatment and 2) aptitude (specifically grammatical sensitivity) within Processing Instruction. Forty-two learners of Spanish in their third-semester of study were divided into two groups: those who received explicit information (EI)…