Abstract

During the past decades, the distinction between implicit and explicit knowledge and how they could be developed through instruction have always been controversial issues for cognitive psychologists and second language acquisition (SLA) researchers. The present study was aimed at investigating the effects of two different input-based tasks (Structured Input and Consciousness Raising) on the acquisition of implicit and explicit knowledge of English active causative structure by EFL learners. Seventy three female English language learners participated in this study. Participants were divided into two experimental groups, one was provided with structured input activities and the other with consciousness raising activities. The participants’ implicit and explicit knowledge of the target structure was assessed through Timed Grammaticality Judgment and Untimed Grammaticality Judgment respectively before and after the treatment. The results of Paired and Independent Samples t-test analyses revealed that both C-R tasks and SI tasks resulted in the acquisition of both implicit and explicit knowledge, with C-R having more significant impact on the explicit knowledge. The findings provided indirect positive support for the interface hypothesis.

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