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Aims and objectives/purpose/research questions: Prior research has put forward that asymmetrical switch costs in language switching do not occur when bilinguals are in a voluntary language-switching context. While several studies have provided evidence along these lines, two very recent studies have put this into question. This study further investigates the possibility that voluntary language switching abolishes asymmetrical switch costs. Design/methodology/approach: We presented German-English bilinguals (n = 79) with pictures that had to be named in either German or English, whichever they chose, by typing. Data and analysis: Reaction times (both the latency of the first keystroke and interkeystroke intervals) were analyzed using linear mixed-effects regression modeling with the factors Trial type (switch vs. repetition trial) and Language (German vs. English), whereas the error rates were analyzed using logistic mixed-effects regression modeling. Findings/conclusions: The onset latencies and inter-keystroke intervals both showed larger second-language (English) than first-language (German) switch costs (i.e., reversed asymmetrical switch costs). As switch costs were modulated by language dominance in a voluntary language-switching context, this study provides evidence that voluntary language switching is not a boundary condition for asymmetrical switch costs. Originality: In contrast to most previous language-switching studies, we used typed rather than vocal responses in a voluntary language-switching paradigm. In addition, our findings further support and generalize very recent findings of (reversed) asymmetrical switch costs in voluntary language switching. Significance/implications: Since asymmetrical switch costs, an important measure of bilingual inhibitory control, are not consistently observed throughout the language-switching literature, it is essential to understand its boundary conditions. [ABSTRACT FROM AUTHOR]

Speaking two or more languages shows bilingual flexibility, but flexible switching requires language control and often incurs performance costs. We examined inhibitory control assessing n − 2 repetition costs when switching three languages (L1 [German], L2 [English], L3 [French]). These costs denote worse performance in n − 2 repetitions (e.g., L2–L3–L2) than in n − 2 nonrepetitions (e.g., L1–L3–L2), indicating persisting inhibition. In two experiments (n = 28 in Experiment 1; n = 44 in Experiment 2), n − 2 repetition costs were observed, but only for L2. Looking into L2 trials specifically, we found n − 2 repetition costs when switching back to L2 from the still weaker L3 but not when returning from the stronger L1, suggesting that L2 is a strong competitor for L3 (requiring L2 inhibition) but less so for L1. Finding n − 2 repetition costs supports an inhibitory account of language control in general, but our study shows only partial evidence for the theoretically assumed more specific relation between language dominance and language inhibition (i.e., only for dominance relations with respect to L1 and L3 when switching back to L2). Taken together, the findings thus suggest the need for further refinement of the concept of language dominance and its relation to inhibition. [ABSTRACT FROM AUTHOR]

In two grammatical decision experiments, we used fast-priming as a novel method for uncovering the syntactic processes involved in written sentence comprehension while limiting the influence of strategic processes. Targets were sequences of four words that could be grammatically correct or not. Targets (e.g. they see the moon) were preceded by the brief (170 ms) presentation of four types of prime: (1) same syntactic structure / same verb (you see a friend); (2) same structure / different verb (she writes a book); (3) different structure / same verb (he sees him now); or (4) different structure / different verb (stay in our hotel). Same structure primes facilitated decisions to grammatical targets in error rates, and this effect did not significantly interact with the facilitatory effect of a shared verb. These results provide evidence for structural priming of sentence reading in conditions that greatly limit any role for strategic processing. [ABSTRACT FROM AUTHOR]

Prior research has shown that a sentence context can decrease the necessity for language control relative to single word processing. In particular, measures of language control such as language switch costs are reduced or even absent in a sentence context. Yet, this evidence is mainly based on bilingual language production and is far from straightforward. To further investigate this issue in the comprehension modality, we relied on the lexical flanker task, which is known to introduce sentence-like processing. More specifically, Dutch-English bilinguals (n = 68) performed a classification task in mixed language blocks on target words that were either presented alone or flanked by unrelated words in the same language. While overall no L1 switch costs were observed, we only observed L2 switch costs in the no-flanker condition. This pattern of results indicates that the presence of flankers can reduce or even abolish switch costs, suggesting that the language control process can benefit from sentence(-like) processing compared to single word processing., Competing Interests: The authors have no competing interests to declare., (Copyright: © 2024 The Author(s).)