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Growing Old with Two Languages: Effects of Bilingualism on Cognitive Aging
Edited by Ellen Bialystok and Margot D. Sullivan
[Studies in Bilingualism 53] 2017
► pp. 243–264

Chapter 12
The impact of bilingualism on cognitive ageing and dementia

Finding a path through a forest of confounding variables

 | University of Edinburgh, UK
Within the current debates on cognitive reserve, cognitive ageing and dementia increasingly showing a positive effect of mental, social and physical activities on health in older age, bilingualism remains one of the most controversial issues. Some reasons for it might be social or even ideological. However, one of the most important genuine problems facing bilingualism research is the high number of potential confounding variables. Bilingual communities often differ from monolingual ones in a range of genetic and environmental variables. In addition, within the same population, bilingual individuals could be different from the outset from those who remain monolingual. We discuss the most common confounding variables in the study of bilingualism, aging and dementia, such as group heterogeneity, migration, social factors, differences in general intelligence and the related issue of reverse causality. We describe different ways in which they can be minimised by the choice of the studied populations and the collected data. In this way, the emerging picture of the interaction between bilingualism and cognitive aging becomes more complex, but also more convincing.
Keywords: cognitive ageing, dementia, confounding variables
Article outline
  • 1.Languages versus pills: Why bilingualism matters in current ageing and dementia research
  • 2.Immigrants, outcasts and elites: Differences between mono- and bilingual populations
  • 3.Chickens, eggs and reverse causality: Individual differences within the same population
  • 4.Competence, performance and exercise: Linguistics meets medicine
  • 5.Pride and prejudice: Who is afraid of bilingualism?
  • Acknowledgements
  • References
Published online: 7 August 2017
DOI logo
https://doi.org/10.1075/sibil.53.12bak
References (73)
References
Abutalebi, J., Della Rosa, P. A., Ding, G., Weekes, B., Costa, A., & Green, D. W. (2013). Language proficiency modulates the engagement of cognitive control areas in multilinguals. Cortex, 49 (3), 905–911. DOI logoGoogle Scholar
Abutalebi, J., Della Rosa, P. A., Green, D. W., Hernandez, M., Scifo, P., Keim, R., Costa, A. (2011). Bilingualism tunes the anterior cingulate cortex for conflict monitoring. Cerebral Cortex, bhr287.Google Scholar
Alladi, S., Bak, T. H., Duggirala, V., Surampudi, B., Shailaja, M., Shukla, A. K., Kaul, S. (2013). Bilingualism delays age at onset of dementia, independent of education and immigration status. Neurology. DOI logo.Google Scholar
Anguera, J., Boccanfuso, J., Rintoul, J., Al-Hashimi, O., Faraji, F., Janowich, J., Johnston, E. (2013). Video game training enhances cognitive control in older adults. Nature, 501 (7465), 97–101. DOI logoGoogle Scholar
Bak, T. H., & Alladi, S. (2014). Can being bilingual affect the onset of dementia? Future Neurology, 9 (2), 101–103. DOI logoGoogle Scholar
Bak, T. H., Nissan, J. J., Allerhand, M. M., & Deary, I. J. (2014). Does bilingualism influence cognitive aging? Annals of neurology. DOI logoGoogle Scholar
Bak, T. H., Vega-Mendoza, M., & Sorace, A. (2014). Never too late? An advantage on tests of auditory attention extends to late bilinguals. Frontiers in psychology, 5. DOI logoGoogle Scholar
Baker, C., & Jones, S. P. (1998). Encyclopedia of bilingualism and bilingual education: Multilingual Matters.Google Scholar
Baum, S., & Titone, D. (2014). Moving toward a neuroplasticity view of bilingualism, executive control, and aging. Applied Psycholinguistics, 35 (05), 857–894. DOI logoGoogle Scholar
Beveridge, M. E., & Bak, T. H. (2011). The languages of aphasia research: Bias and diversity. Aphasiology, 25 (12), 1451–1468. DOI logoGoogle Scholar
Bialystok, E., Craik, F. I., Binns, M. A., Ossher, L., & Freedman, M. (2014). Effects of bilingualism on the age of onset and progression of MCI and AD: Evidence from executive function tests. Neuropsychology, 28 (2), 290. DOI logoGoogle Scholar
Bialystok, E., Craik, F. I., & Freedman, M. (2007). Bilingualism as a protection against the onset of symptoms of dementia. Neuropsychologia, 45 (2), 459–464. DOI logoGoogle Scholar
Bialystok, E., Craik, F. I., & Luk, G. (2012). Bilingualism: Consequences for mind and brain. Trends in cognitive sciences, 16 (4), 240–250. DOI logoGoogle Scholar
Bialystok, E., & Viswanathan, M. (2009). Components of executive control with advantages for bilingual children in two cultures. Cognition, 112 (3), 494–500. DOI logoGoogle Scholar
Bybee, J. (2006). From usage to grammar: The mind’s response to repetition. Language, 711–733. DOI logoGoogle Scholar
Chertkow, H., Whitehead, V., Phillips, N., Wolfson, C., Atherton, J., & Bergman, H. (2010). Multilingualism (but not always bilingualism) delays the onset of Alzheimer disease: evidence from a bilingual community. Alzheimer Disease & Associated Disorders, 24(2), 118–125. DOI logoGoogle Scholar
Chomsky, N. (1964). Aspects of the Theory of Syntax: DTIC Document.Google Scholar
Clare, L., Whitaker, C. J., Craik, F. I., Bialystok, E., Martyr, A., Martin-Forbes, P. A., Thomas, E. M. (2014). Bilingualism, executive control, and age at diagnosis among people with early-stage Alzheimer’s disease in Wales. Journal of neuropsychology. DOI logoGoogle Scholar
Cooper, J. (1993). Bilingual babel: cuneiform texts in two or more languages from ancient Mesopotamia and beyond. Visible language, 27 (1–2), 68–96.Google Scholar
Corley, J., Jia, X., Kyle, J. A., Gow, A. J., Brett, C. E., Starr, J. M., Deary, I. J. (2010). Caffeine consumption and cognitive function at age 70: the Lothian Birth Cohort 1936 study. Psychosomatic medicine, 72 (2), 206–214. DOI logoGoogle Scholar
Costa, A., Hernández, M., Costa-Faidella, J., & Sebastián-Gallés, N. (2009). On the bilingual advantage in conflict processing: Now you see it, now you don’t. Cognition, 113 (2), 135–149. DOI logoGoogle Scholar
Craik, F. I., Bialystok, E., & Freedman, M. (2010). Delaying the onset of Alzheimer disease Bilingualism as a form of cognitive reserve. Neurology, 75 (19), 1726–1729. DOI logoGoogle Scholar
Crane, P. K., Gibbons, L. E., Arani, K., Nguyen, V., Rhoads, K., McCurry, S. M., White, L. (2009). Midlife use of written Japanese and protection from late life dementia. Epidemiology (Cambridge, Mass.), 20 (5), 766. DOI logoGoogle Scholar
Crane, P. K., Gruhl, J. C., Erosheva, E. A., Gibbons, L. E., McCurry, S. M., Rhoads, K., White, L. (2010). Use of spoken and written Japanese did not protect Japanese-American men from cognitive decline in late life. The Journals of Gerontology Series B: Psychological Sciences and Social Sciences, 65 (6), 654–666. DOI logoGoogle Scholar
de Bruin, A., Bak, T. H., & Della Sala, S. (2015). Examining the effects of active versus inactive bilingualism on executive control in a carefully matched non-immigrant sample. Journal of Memory and Language, 85, 15–26. DOI logoGoogle Scholar
de Bruin, A., Treccani, B., & Della Sala, S. (2014). Cognitive Advantage in Bilingualism An Example of Publication Bias? Psychological science. DOI logo.Google Scholar
Deary, I. J., Corley, J., Gow, A. J., Harris, S. E., Houlihan, L. M., Marioni, R. E., Starr, J. M. (2009). Age-associated cognitive decline. British medical bulletin, 92 (1), 135–152. DOI logoGoogle Scholar
Deary, I. J., Gow, A. J., Pattie, A., & Starr, J. M. (2012). Cohort profile: the Lothian birth cohorts of 1921 and 1936. International journal of epidemiology, 41 (6), 1576–1584. DOI logoGoogle Scholar
Deary, I. J., Gow, A. J., Taylor, M. D., Corley, J., Brett, C., Wilson, V., Porteous, D. J. (2007). The Lothian Birth Cohort 1936: a study to examine influences on cognitive ageing from age 11 to age 70 and beyond. BMC geriatrics, 7 (1), 28. DOI logoGoogle Scholar
Deary, I. J., & Johnson, W. (2010). Intelligence and education: causal perceptions drive analytic processes and therefore conclusions. International journal of epidemiology, 39 (5), 1362–1369. DOI logoGoogle Scholar
Do Lee, C., Folsom, A. R., & Blair, S. N. (2003). Physical activity and stroke risk a meta-analysis .Stroke, 34 (10), 2475–2481. DOI logoGoogle Scholar
Duñabeitia, J. A., Hernández, J. A., Antón, E., Macizo, P., Estévez, A., Fuentes, L. J., & Carreiras, M. (2014). The inhibitory advantage in bilingual children revisited: Myth or reality? Experimental psychology, 61 (3), 234. DOI logoGoogle Scholar
Easterbrook, P. J., Gopalan, R., Berlin, J., & Matthews, D. R. (1991). Publication bias in clinical research. The Lancet, 337 (8746), 867–872. DOI logoGoogle Scholar
Evans, N. (2009).Dying words: Endangered languages and what they have to tell us (Vol. 10):Wiley-Blackwell. DOI logoGoogle Scholar
François, A. (2012). The dynamics of linguistic diversity: Egalitarian multilingualism and power imbalance among northern Vanuatu languages. International Journal of the Sociology of Language, 2012 (214), 85–110. DOI logoGoogle Scholar
Freedman, M., Alladi, S., Chertkow, H., Bialystok, E., Craik, F. I., Phillips, N. A., Bak, T. H. (2014). Delaying Onset of Dementia: Are Two Languages Enough? Behavioural Neurology, 2014. DOI logoGoogle Scholar
Fuller-Thomson, E., & Kuh, D. (2014). The healthy migrant effect may confound the link between bilingualism and delayed onset of Alzheimer’s disease. Cortex; a journal devoted to the study of the nervous system and behavior, 52, 128. DOI logoGoogle Scholar
Garbin, G., Sanjuan, A., Forn, C., Bustamante, J. C., Rodriguez-Pujadas, A., Belloch, V., Ávila, C. (2010). Bridging language and attention: brain basis of the impact of bilingualism on cognitive control. Neuroimage, 53 (4), 1272–1278. DOI logoGoogle Scholar
Gold, B. T., Kim, C., Johnson, N. F., Kryscio, R. J., & Smith, C. D. (2013). Lifelong bilingualism maintains neural efficiency for cognitive control in aging. The Journal of Neuroscience, 33 (2), 387–396. DOI logoGoogle Scholar
Gollan, T. H., Salmon, D. P., Montoya, R. I., & Galasko, D. R. (2011). Degree of bilingualism predicts age of diagnosis of Alzheimer’s disease in low-education but not in highly educated Hispanics. Neuropsychologia, 49 (14), 3826–3830. DOI logoGoogle Scholar
Gow, A. J., Johnson, W., Pattie, A., Brett, C. E., Roberts, B., Starr, J. M., & Deary, I. J. (2011). Stability and change in intelligence from age 11 to ages 70, 79, and 87: the Lothian Birth Cohorts of 1921 and 1936. Psychology and aging, 26 (1), 232. DOI logoGoogle Scholar
Green, D. W. (2011). Language control in different contexts: the behavioral ecology of bilingual speakers. Frontiers in psychology, 2. DOI logoGoogle Scholar
Hawkins, J. A. (2004).Efficiency and complexity in grammars: Oxford University Press Oxford. DOI logoGoogle Scholar
Henrich, J., Heine, S. J., & Norenzayan, A. (2010). The weirdest people in the world? Behavioral and brain sciences, 33 (2–3), 61–83. DOI logoGoogle Scholar
Iyer, G. K., Alladi, S., Bak, T. H., Shailaja, M., Mamidipudi, A., & Rajan, A. (2014). Dementia in developing countries: does education play the same role in India as in the West? Dement. neuropsychol, 8 (2). DOI logoGoogle Scholar
Kavé, G., Eyal, N., Shorek, A., & Cohen-Mansfield, J. (2008). Multilingualism and cognitive state in the oldest old. Psychology and aging, 23 (1), 70. DOI logoGoogle Scholar
Kovács, Á. M., & Mehler, J. (2009). Cognitive gains in 7-month-old bilingual infants. Proceedings of the National Academy of Sciences, 106 (16), 6556–6560. DOI logoGoogle Scholar
Kroll, J. F. (2015). On the consequences of bilingualism: We need language and the brain to understand cognition. Bilingualism: Language and Cognition, 18 (01), 32–34. DOI logoGoogle Scholar
Lampit, A., Hallock, H., & Valenzuela, M. (2014). Computerized Cognitive Training in Cognitively Healthy Older Adults: A Systematic Review and Meta-Analysis of Effect Modifiers. PLoS medicine, 11 (11). DOI logo.Google Scholar
Luciano, M., Marioni, R. E., Gow, A. J., Starr, J. M., & Deary, I. J. (2009). Reverse causation in the association between C-reactive protein and fibrinogen levels and cognitive abilities in an aging sample. Psychosomatic medicine, 71 (4), 404–409. DOI logoGoogle Scholar
MacMahon, S., Peto, R., Collins, R., Godwin, J., MacMahon, S., Cutler, J., Neaton, J. (1990). Blood pressure, stroke, and coronary heart disease: part 1, prolonged differences in blood pressure: prospective observational studies corrected for the regression dilution bias. The Lancet, 335 (8692), 765–774. DOI logoGoogle Scholar
Martyr, A., Hindle, J. V., Whitaker, C. J., Craik, F. I., Bialystok, E., Martin-Forbes, P. A., Thomas, E. M. (2014). Bilingualism, executive control, and cognitive reserve: Implications for prevention of Alzheimer’s disease. Alzheimer’s & Dementia: The Journal of the Alzheimer’s Association, 10 (4), P586. DOI logoGoogle Scholar
Mullen, A., & James, P. (2012). Multilingualism in the Graeco-Roman worlds: Cambridge University Press. DOI logoGoogle Scholar
Paap, K. R., & Greenberg, Z. I. (2013). There is no coherent evidence for a bilingual advantage in executive processing. Cognitive psychology, 66 (2), 232–258. DOI logoGoogle Scholar
Paap, K. R., Sawi, OM, Dalibar C, Darrow, J, Johnson, HA. (2014). The Brain Mechanisms Underlying the Cognitive Benefits of Bilingualism may be Extraordinarily Difficult to Discover. AIMS Neuroscience, 1 (3), 245–256. DOI logoGoogle Scholar
Padilla, C., Jimenez, E., Barsuglia, J., Joshi, A., Teng, E., & Mendez, M. (2014). Bilingualism Is Associated With Less Severe Cognitive Impairment (P2. 172). Neurology, 82 (10 Supplement), P2. 172-P172.172.Google Scholar
Park, D. C., Lodi-Smith, J., Drew, L., Haber, S., Hebrank, A., Bischof, G. N., & Aamodt, W. (2014). The Impact of Sustained Engagement on Cognitive Function in Older Adults The Synapse Project. Psychological science, 25 (1), 103–112. DOI logoGoogle Scholar
Perquin, M., Vaillant, M., Schuller, A.-M., Pastore, J., Dartigues, J.-F., Lair, M.-L., Group, M. (2013). Lifelong exposure to multilingualism: new evidence to support cognitive reserve hypothesis. PloS one, 8 (4), e62030. DOI logoGoogle Scholar
Plassman, B. L., Williams, J. W., Burke, J. R., Holsinger, T., & Benjamin, S. (2010). Systematic review: factors associated with risk for and possible prevention of cognitive decline in later life. Annals of Internal Medicine, 153 (3), 182–193. DOI logoGoogle Scholar
Richards, M., & Deary, I. J. (2005). A life course approach to cognitive reserve: a model for cognitive aging and development? Annals of neurology, 58 (4), 617–622. DOI logoGoogle Scholar
Saer, D. (1923). The effect of bilingualism on intelligence. British Journal of Psychology. General Section, 14 (1), 25–38. DOI logoGoogle Scholar
Sanders, A. E., Hall, C. B., Katz, M. J., & Lipton, R. B. (2012). Non-native language use and risk of incident dementia in the elderly. Journal of Alzheimer’s Disease, 29 (1), 99–108.Google Scholar
Schweizer, T. A., Ware, J., Fischer, C. E., Craik, F. I., & Bialystok, E. (2012). Bilingualism as a contributor to cognitive reserve: Evidence from brain atrophy in Alzheimer’s disease. Cortex, 48 (8), 991–996. DOI logoGoogle Scholar
Stern, Y. (2002). What is cognitive reserve? Theory and research application of the reserve concept. Journal of the International Neuropsychological Society, 8 (03), 448–460. DOI logoGoogle Scholar
Sterling, T. D. (1959). Publication decisions and their possible effects on inferences drawn from tests of significance – or vice-versa. Journal of the American Statistical Association, 54, 30–34.Google Scholar
Titone, D., & Baum, S. (2014). The future of bilingualism research: Insufferably optimistic and replete with new questions. Applied Psycholinguistics, 35 (05), 933–942. DOI logoGoogle Scholar
Valian, V. (2015). Bilingualism and cognition: A focus on mechanisms. Bilingualism: Language and Cognition, 18 (01), 47–50. DOI logoGoogle Scholar
Vasanta, D., Suvarna, A., Sireesha, J., & Raju, S. B. (2010).Language choice and language use patterns among Telugu-Hindi/Urdu-English speakers in Hyderabad, India. Paper presented at the Proceedings of the International Conference on Language, Society and Culture in Asian Contexts.Google Scholar
Vega-Mendoza, M., West, H., Sorace, A., & Bak, T. H. (2015). The impact of late, non-balanced bilingualism on cognitive performance. Cognition, 137, 40–46. DOI logoGoogle Scholar
Woumans, E., Santens, P., Sieben, A., Versijpt, J., Stevens, M., & Duyck, W. (2014). Bilingualism delays clinical manifestation of Alzheimer’s disease. Bilingualism: Language and Cognition, Publication on-line 29 Dec 2014, 1–7.Google Scholar
Yeung, C. M., John, P. D. S., Menec, V., & Tyas, S. L. (2014). Is Bilingualism Associated With a Lower Risk of Dementia in Community-living Older Adults? Cross-sectional and Prospective Analyses. Alzheimer disease and associated disorders. DOI logoGoogle Scholar
Zahodne, L. B., Schofield, P. W., Farrell, M. T., Stern, Y., & Manly, J. J. (2014). Bilingualism does not alter cognitive decline or dementia risk among Spanish-speaking immigrants. Neuropsychology, 28 (2), 238. DOI logoGoogle Scholar
Zou, L., Abutalebi, J., Zinszer, B., Yan, X., Shu, H., Peng, D., & Ding, G. (2012). Second language experience modulates functional brain network for the native language production in bimodal bilinguals. Neuroimage, 62 (3), 1367–1375. DOI logoGoogle Scholar
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