Evidence map›Paper›PMID 34054162›Full record

ArticleApplied psycholinguistics2021

Measuring Bilingualism: The Quest for a "Bilingualism Quotient".

Viorica Marian, Sayuri Hayakawa

Abstract read
In one paragraph

Article in Applied psycholinguistics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Language-dependent expression of anxiety and depression symptoms in Japanese-English bilinguals.Clinical psychological science : a journal of the Association for Psychological Science · 2026
    Article
  4. Article
  5. Article
  6. One test, many tongues: Surveying language proficiency across the globe.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  7. Article
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  9. Review
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  11. Article
  12. Heterogeneity in cognitive profiles of monolingual and bilingual Hispanic/Latino older adults in HABS-HD.Journal of the International Neuropsychological Society : JINS · 2024
    Article
  13. Article
  14. Article
  15. Article
  16. Musical and Multilingual Experience Are Related to Healthy Aging: Better Some Than None But Even Better Together.The journals of gerontology. Series B, Psychological sciences and social sciences · 2023
    Article
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Viorica MarianNorthwestern University.
Sayuri HayakawaNorthwestern University.

Funding

Cognitive Architecture of Bilingual Language ProcessingR01HD059858 · NICHD · NORTHWESTERN UNIVERSITY · PI Viorica Marian · 2010 to 2026
$6.2M
NICHD NIH HHS R01 HD059858
6 · The paper itself

Abstract

The study of bilingualism has a history that extends from deciphering ancient multilingual texts to mapping the structure of the multilingual brain. The language experiences of individual bilinguals are equally diverse and characterized by unique contexts of acquisition and use that can shape not only sociocultural identity, but also cognitive and neural function. Perhaps unsurprisingly, this variability in scholarly perspectives and language experiences has given rise to a range of methods for defining bilingualism. The goal of this paper is to initiate a conversation about the utility of a more unified approach to how we think about, study, and measure bilingualism. Using concrete case studies, we illustrate the value of enhancing communication and streamlining terminology across researchers with different methodologies within questions, different questions within domains, and different domains within scientific inquiry. We specifically consider the utility and feasibility of a Bilingualism Quotient (BQ) construct, discuss the idea of a BQ relative to the well-established Intelligence Quotient (IQ), and include recommendations for next steps. We conclude that though the variability in language backgrounds and approaches to defining bilingualism presents significant challenges, concerted efforts to systematize and synthesize research across the field may enable the construction of a valid and generalizable index of multilingual experience.

Indexed as

bilingualismindividual differenceslanguage experiencelanguage proficiency

Identifiers

PMID34054162
PMCPMC8158058

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.