Cross-Linguistic Interactions in Third Language Acquisition: Evidence from Multi-Feature Analysis of Speech Perception

Abstract

Research on third language (L3) phonological acquisition has shown that Cross-Linguistic Influence (CLI) plays a role not only in forming the newly acquired language but also in reshaping the previously established ones. Only a few studies to date have examined cross-linguistic effects in the speech perception of multilingual learners. The aim of this study is to explore the development of speech perception in young multilinguals’ non-native languages (L2 and L3) and to trace the patterns of CLI between their phonological subsystems over time. The participants were 13 L1 Polish speakers (aged 12–13), learning English as L2 and German as L3. They performed a forced-choice goodness task in L2 and L3 to test their perception of rhotics and final obstruent (de)voicing. Response accuracy and reaction times were recorded for analyses at two testing times. The results indicate that CLI in perceptual development is feature-dependent with relative stability evidenced for L2 rhotics, reverse trends for L3 rhotics, and no significant development for L2/L3 (de)voicing. We also found that the source of CLI differed across the speakers’ languages: the perception accuracy of rhotics differed significantly with respect to stimulus properties, that is, whether they were L1-, L2-, or L3-accented.