Bilinguals have more effective executive function: Evidence from an fNIRS study of the neural correlates of cognitive shifting

Abstract

Aims and objectives/purpose/research questions:

The bilingual advantage in executive function (EF) has recently been explored with functional near-infrared spectroscopy (fNIRS) technology, but the results are still controversial because of the limited statistical analysis. This study aims to fill the gap by replicating the existing studies and advancing the statistical analysis.

Design/methodology/approach:

Altogether, 35 preschoolers (aged between 4.1 and 6.3 years, M_age = 5.0 years, SD = 0.59) completed the Peabody Picture Vocabulary Test—Fourth Edition (PPVT-4) and the Dimensional Change Card Sort (DCCS) task. Their behavioral performance and the associated brain activities during the three sessions of the DCCS task were measured using fNIRS. In addition, they were classified into either Bilingual or Monolingual groups based on the PPVT scores.

Data and analysis:

t-tests and quadratic regression analyses were conducted to examine whether children’s performance in the DCCS was related to their bilingualism and whether the changes in oxygenated hemoglobin (HbO) in the prefrontal regions were related to their bilingualism and performance in the DCCS.

Findings/conclusions:

The behavioral data analysis indicated no significant differences between the monolinguals and bilinguals. However, the fNIRS evidence indicated that (1) the monolinguals had to recruit 15 channels to complete the cognitive shifting of DCCS tasks, whereas the bilinguals only employed 11; (2) the bilinguals had significantly more brain activation with fewer channels in BA 44 than the monolinguals, demonstrating more effective executive function.

Originality:

This study has advanced the statistical analysis of the HbO changes for the cognitive shifting in the DCCS by confirming the nonlinear U-shape by quadratic regression a better fit than the linear V-shape by GLM.

Significance/implications:

This finding implies that early bilingual experience has equipped young children with more effective executive function.

Keywords

Bilingualism executive function fNIRS prefrontal cortex bilingual advantage

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References

Abutalebi

Green

D. W.

(2008). Control mechanisms in bilingual language production: Neural evidence from language switching studies. Language and Cognition Processes, 23(4), 557–582. https://doi.org/10.1080/01690960801920602

Antoniou

(2019). The advantages of bilingualism debate. Annual Reviews of Linguistics, 5, 395–415. https://doi.org/10.1146/annurev-linguistics-011718-011820

Barac

Bialystok

Castro

D. C.

Sanchez

(2014). The cognitive development of young dual language learners: A critical review. Early Childhood Research Quarterly, 29(4), 699–714. https://doi.org/10.1016/j.ecresq.2014.02.003

Bialystok

(2017). The bilingual adaptation: How minds accommodate experience. Psychological Bulletin, 142(3), 233–262. https://doi.org/10.1037/bul10000099

Bialystok

Craik

F. I.

Luk

(2012). Bilingualism: Consequences for mind and brain. Trends in Cognitive Sciences, 16(4), 240–250. https://doi.org/10.1016/j.tics.2012.03.001

Collette

Van der Linden

Laureys

Delfiore

Degueldre

Luxen

Salmon

(2005). Exploring the unity and diversity of the neural substrates of executive functioning. Human Brain Mapping, 25(4), 409–423.

Costa

Sebastián-Gallés

(2014). How does the bilingual experience sculpt the brain? Nature Reviews Neuroscience, 15(5), 336–345. https://doi.org/10.1038/nrn3709

Duncan

Meek

J. H.

Clemence

Elwell

C. E.

Fallon

Tyszczuk

. . .Delpy

D. T.

(1996). Measurement of cranial optical path length as a function of age using phase resolved near-infrared spectroscopy. Pediatric Research, 39(5), 889–894.

Dunn

L. M.

Dunn

D. M.

(2007). PPVT 4 Peabody Picture Vocabulary Test (4th ed.). Pearson Assessments.

10.

Gunnerud

H. L.

Ten Braak

Reikerås

E. K. L.

Donolato

Melby-Lervåg

(2020). Is bilingualism related to a cognitive advantage in children? A systematic review and meta-analysis. Psychological Bulletin, 146(12), 1059–1083. https://doi.org/10.1037/bul0000301

11.

Higby

Jungna

Obler

L. K.

(2013). Multilingualism and the brain. Annual Review of Applied Linguistics, 33, 68–101. https://doi.org/10.1017/S0267190513000081

12.

Yang

Xie

Luo

Chang

(2020). A functional near-infrared spectroscopy examination of the neural correlates of cognitive shifting in dimensional change card sort task. Frontiers in Human Neuroscience, 14, Article 561223.

13.

Liddicoat

(1991). Bilingualism: An introduction. NLIA Occational Paper No.2. Publisher: National Languages Institute of Australia. (ERIC # ED35759)

14.

Lloyd-Fox

Blasi

McCann

Rozhko

Katus

Mason

,. . . BRIGHT Project Team. (2019). Habituation and novelty detection fNIRS brain responses in 5- and 8-month-old infants: The Gambia and UK. Developmental Science, 22(5), Article e12817.

15.

Moriguchi

Hiraki

(2009). Neural origin of cognitive shifting in young children. Proceedings of the National Academy of Sciences, 106(14), 6017–6021.

16.

Moriguchi

Hiraki

(2013). Prefrontal cortex and executive function in young children: A review of NIRS studies. Frontiers in Human Neuroscience, 7, Article 867.

17.

Moriguchi

Lertladaluck

(2020). Bilingual effects on cognitive shifting and prefrontal activations in young children. International Journal of Bilingualism, 24, 729–739. https://doi.org/10.1177/1367006919880274

18.

Tran

C. D.

Arredondo

M. M.

Yoshida

(2019). Early executive function: The influence of culture and bilingualism. Bilingualism: Language and Cognition, 22(4), 714–732.

19.

Weber

R. C.

Johnson

Riccio

C. A.

Liew

(2016). Balanced bilingualism and executive functioning in children. Bilingualism: Language and Cognition, 19(2), 425–431.

20.

Xie

Yang

Luo

Chang

(2021). An fNIRS examination of executive function in bilingual young children. International Journal of Bilingualism, 25, 519–530.

21.

Yoon

J. A.

Kong

I. J.

Choi

Baek

J. Y.

Kim

E. J.

Shin

Y. I.

, et al (2019). Neural compensatory response during complex cognitive function tasks in mild cognitive impairment: A near-infrared spectroscopy study. Neural Plasticity, 2019, Article 7845104. 10.1155/2019/7845104

22.

Zelazo

P. D.

Müller

Frye

Marcovitch

(2003). The development of executive function in early childhood: I. The development of executive function. Monographs of the Society for Research in Child Development, 68(3), 11–27.