Bilingualism
Does language similarity affect mental control and language skills?
Open access · cc by · source: Europe PMC
Speaking highly dissimilar languages is linked to lower native-language accuracy, but it does not reliably boost general executive cognitive control.
How this study connects
Role on claims
Each row is a claim on a concept or method page where this paper supports, challenges, or qualifies the statement. Roles are hand-checked — not a model guess.
While some evidence suggests that bilingualism and second-language proficiency provide specific cognitive advantages in attention or cognitive reserve, multiple large studies show no generalized executive control or switching advantage across the lifespan.
Evidence for the claim as stated.
Open questions
Tensions this paper is part of
From concept pages' “where studies disagree.” Disagreement means the same question; scope means different assays, populations, or outcomes.
While some evidence suggests that bilingualism and second-language proficiency provide specific cognitive advantages in attention or cognitive reserve, multiple large studies show no generalized executive control or switching advantage across the lifespan.
- Supports · Do different bilingual environments affect children's attention?
- Supports · How bilingualism protects the aging brain's executive control
- Supports · Does bilingualism actually improve executive brain functions?
- Supports · Does Being Bilingual Really Improve Brain Performance?
- Supports · Does intense language translation training improve mental focus?
Study at a glance
- Design
- Cross-sectional — Four language-similarity groups compared on German linguistic and executive-function batteries
- N
- N=99 · Monolinguals 25, Swiss-German bidialectals 26, similar bilinguals 24, dissimilar bilinguals 24
- Population
- Young adults (18–33) classified by German and other-language similarity
- Outcome
- German linguistic accuracy and executive-function performance by language profile
Structured fields used in claim comparison tables when every cited study has a complete layer.
Inspect source passages
Does language similarity affect mental control and language skills?
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
The final analyzed sample included 99 participants.
Thus, the final sample consisted of 99 participants, aged 18–33 years (M = 23.5, SD = 3.69).
There were 25 participants in the monolingual group.
Monolinguals ( n = 25) were native speakers of only Standard German and had limited knowledge of the Swiss German dialect.
Key findings
Linguistic accuracy in German decreased linearly as the similarity of the speaker's other languages decreased, meaning dissimilar bilinguals had the lowest native-language accuracy. Conversely, there was no robust evidence that language similarity improved general executive functions, as evidence for five out of six executive measures supported the null hypothesis. The only exception was a specific working memory benefit found in bidialectals compared to monolinguals.
Methodology
The researchers evaluated 99 young adults classified into four groups based on language similarity to German: monolinguals, Swiss-German bidialectals, similar bilinguals, and dissimilar bilinguals. Participants completed three paper-and-pencil tasks testing German linguistic ability and a computerized battery of 11 cognitive tasks. These tasks assessed five executive function domains: inhibition, shifting, mixing, monitoring, and working memory.
Limitations
Because the study used a quasi-experimental, correlational design, it cannot prove that speaking different languages directly causes changes in cognitive performance. The sample was restricted to highly educated university students in Switzerland, meaning the findings may not generalize to other age groups or socio-demographic populations. Additionally, the monolingual control group had some formal exposure to foreign languages in secondary school, which prevents comparisons to completely isolated monolinguals.
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