A novelty effect in phonetic drift of the native language

Previous findings on adult second-language (L2) learners showed systematic phonetic changes in their production of the native language (L1) starting in the first weeks of L2 learning [Chang, C. B. (2012). Rapid and multifaceted effects of second-language learning on first-language speech production. Journal of Phonetics, 40, 249-268]. This "phonetic drift" of L1 production in novice L2 learners was consistent with reports of phonetic drift in advanced L2 learners; however, the fact that novice learners showed relatively pronounced drift was unexpected. To explore the hypothesis that this pattern is due to a novelty effect boosting the encoding and retrieval of elementary L2 experience, the current study compared the inexperienced learners analyzed previously (learners with no prior knowledge of the L2) to experienced learners enrolled in the same language program. In accordance with the hypothesis, experienced learners manifested less phonetic drift in their production of L1 stops and vowels than inexperienced learners, suggesting that progressive familiarization with an L2 leads to reduced phonetic drift at later stages of L2 experience. These findings contradict the assumption that L2 influence on the L1 is weakest at early stages of L2 learning and argue in favor of viewing the L1 and L2 both as dynamic systems undergoing continuous change. (C) 2013 Elsevier Ltd. All rights reserved.