Destabilizing effects of L2 explicit pronunciation instruction on L1 speech:

Abstract

Anchored in a Complex Dynamic perspective on language development, this study explores the effects of L2 explicit pronunciation instruction on L2 English and L1 Brazilian Portuguese VOT production. To this end, 16 Brazilian intermediate users of L2 English were investigated. Volunteers were divided into control and experimental groups. The latter received explicit pronunciation instruction on the production of the English voiceless stops. The study included three data collections, a pre-test, an immediate post-test and a delayed post-test. An acoustic analysis of VOT duration is reported. The results revealed that the control group did not produce the expected VOT pattern for L2 English at any time of the study. No alterations in the L1 were reported. On the other hand, after the instruction, the experimental group produced higher L2 English VOT values. First language attrition was reported since the L1 BP VOT durations also increased after instruction. In addition to highlighting the effects of explicit instruction on L2 development and L1 attrition, this study confirms that language development is constant, and that even L1 adult grammars are not rigid, with potential to change due to the perception and processing of novel nonnative phonetic-phonological categories.