The effect of inhibitory control and its training on L1 and a new learned language switching

Abstract

Aims:

This study aimed to investigate how individuals’ inhibitory control (IC) ability affects language switching in the initial period of language learning.

Design:

Using a pretest/posttest design and event-related potential (ERP) methodology, we investigated the effect of IC on Chinese–English bilinguals during their language switching between Chinese (L1) and Korean (a language new to the participants, Lnew). All participants were required to name pictures (picture-naming task) in their L1 and Lnew in the pretest and posttest. Low-IC participants received an IC task training between the pretest and the posttest, while the high-IC group did not.

Data and analysis:

Analyses of both response latencies and ERP data were conducted by repeated-measures ANOVA.

Findings:

Results showed that the high-IC group exhibited symmetrical switch costs in both the pretest and the posttest. Besides, a more obvious late positive component (LPC) was observed when the high-IC participants switched from L1 to Lnew than the other way around, indicating their ability to inhibit cross-language interference. In contrast, the low-IC group exhibited asymmetrical switch costs, and no amplitude difference when switching between Lnew and L1 in the pretest. However, in the posttest, the switch costs pattern and the LPC results of the low-IC group became similar to those of the high-IC group.

Innovation:

The present study was a first attempt to provide electrophysiological evidence that IC ability plays an important role during L1–Lnew switching.

Significance:

These findings support the hypothesis that individuals’ IC ability plays a role of suppressing the non-target lexical access during language switching in the initial period of second language learning. The results also indicate that the relevant training in IC ability could contribute to the improvement of the language-switching efficiency in the initial period of language learning.

Keywords

Language switching a new language inhibitory control training LPC

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