User:Ck320492/Cognitive effects of multilingualism

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Article Draft[edit]

General questions[edit]

  • Why is the title "cognitive effects of multilingualism" if the content mainly refers to bilingualism? People can be tri+lingual, but article has no focus on polyglots. Ah - had to dig into the "talk" section - found it was originally called "cognitive effects of bilingualism" but was changed to "multilingualism" as bilingualism is apparently a subset. Very unclear because the term "multilingualism" isn't mentioned until the end of the fifth paragraph, after section listing.

Potential areas to improve[edit]

  • Add clarification of bilingualism being a section of multilingualism
    • Or, change article back to previous title, since article doesn't seem to mention other areas of multilingualism (like trilinguals are more known)
  • Reword sections to contain less academic jargon
    • Change passive > active voice
  • Look to replace primary source references with secondary/textbook sources
    • Remove confusing resources
  • Watch for presentations of both sides of the story, biased tones
    • Current controversy in field of bilingualism: some say knowing 2 languages > improves working memory, language use, etc, and others say no evidence.
      • Atlantic article here
  • Add to Age of acquisition section - known importance for language acquisition by deaf children
Previous edit[edit]

Reworded first 4 paragraphs to reduce jargon and use more active voice. Did so before training on sandbox drafts, so moving forward will use that.

Adding an image[edit]

Tried to add image of CODA movie in "bimodal bilinguals" section, but received feedback on use justification. Continuing to brainstorm. Messaged Ian, Wiki help person, to ensure I did the attribution of fair use image correctly.

Non-free media information and use rationale true – WARNING: https://en.wikipedia.org/wiki/Cognitive_effects_of_bilingualism does not appear to exist!
Check capitalization. Enter only the exact title of a single article with no [[link brackets]] or other formatting. It is also possible the indicated article was deleted.
Description

Movie poster of "CODA" (Apple TV+). The main character, the youngest daughter, is bilingual in two language modalities: English, a spoken language, and American Sign Language, a signed language.

Source

https://en.wikipedia.org/wiki/File:Coda_poster.jpeg

Article

[[1]]

Portion used

The whole work is used to prevent misinterpreting the work. it includes the movie product and conveys the intended brand.

Low resolution?

This copy is reasonable resolution for the reference, but copies will be worse quality than the original poster.

Purpose of use

This non-free art is to reference a public example of a person (character) who is a bimodal bilingual. It identifies the movie product and enables a user to search for the movie and read commentaries, or watch the movie itself, to understand the bilingual bimodal's language experience and relationship to others. This image is within the section, bimodal bilinguals, to associate the meaning with someone who represents such an identity. Use for this purpose does not conflict with the original poster's intended purpose, visual design service for the commericalized item.

Replaceable?

As a film poster, the image is not replaceable by free content. It acts as an understandable narrative example of a bimodal bilingual. Other images depicting the same reference to this story would also be copyrighted. Other image versions depicting bilingual bimodals, such as a person signing and speaking simultaneously, would not be easily understandable from a static image. Use of this image enables connection with the story behind the bilingual bimodal experience.

Fair useFair use of copyrighted material in the context of [[2]]//en.wikipedia.org/wiki/User:Ck320492/Cognitive_effects_of_multilingualismtrue
Linking to articles:[edit]

Moved title > cognitive effects of bilingualism[edit]

Made the following changes:

  • Title: "Cognitive effects of mulitilingualism" to "Cognitive effects of bilingualism" - Template:Renaming
    • Added to talk page. As mentioned in August 2018 talk between Catriona and Varnellr16. While Multilingualism is more general, the article content doesn't include commentary on more than 2 languages (ex. trilinguals).

Intro[edit]

  • First paragraph: reference bilingualism being a subset of multilingualism
Adding links to relevant pages:[edit]
  • First paragraph: Bilingualism, a subset of multilingualism, means having proficiency in two or more languages. A bilingual individual is traditionally defined as someone who understands and produces two or more languages on a regular basis. A bilingual individual's initial exposure to both languages may start in early childhood, e.g. before age 3, but exposure may also begin later in life, in monolingual or bilingual education. Equal proficiency in a bilingual individuals's languages is rarely seen as it typically varies by domain. For example, a bilingual individual may have greater proficiency for work-related terms in one language, and family-related terms in another language.
  • Fourth paragraph: There is, however, strong disagreement over how findings on this subject should be interpreted. Systematic reviews and meta-analyses of executive functioning studies have failed to find compelling evidence for cognitive advantages in healthy adults or in participants across a broader age range. Moreover, the distribution of effect sizes in meta-analyses suggest publication bias, or that the reporting of bilingualism effects on executive functioning give a distorted view of the evidence.
Primary > Secondary sources:[edit]

Bilingualism, a subset of multilingualism[5][6], means having proficiency in two or more languages[7]. A bilingual individual is traditionally defined as someone who understands and produces two or more languages on a regular basis.[8] A bilingual individual's initial exposure to both languages may start in early childhood, e.g. before age 3,[9] but exposure may also begin later in life, in monolingual or bilingual education. Equal proficiency in a bilingual individuals' languages is rarely seen as it typically varies by domain[10]. For example, a bilingual individual may have greater proficiency for work-related terms in one language, and family-related terms in another language.[8]

Being bilingual has been linked to a number of cognitive benefits.[11] Research on how a bilingual individual's first language (L1) and second language (L2) interact shows that both languages have an influence on the function of one-another and on cognitive function outside of language. Research on executive functions like working memory, perception, and attentional and inhibitory control, suggests that bilinguals can benefit from significant cognitive advantages over monolingual peers in various settings[12]. There are also age-related benefits which seem to protect against cognitive decline in older adults.

Throughout the history of research into the cognitive advantages of bilingualism, views have shifted from a subtractive to an additive perspective:[13] it is now believed that being bilingual adds to an individual's abilities rather than subtracting from it.

There is, however, strong disagreement over how findings on this subject should be interpreted.[14] Systematic reviews and meta-analyses of executive functioning studies have failed to find compelling evidence for cognitive advantages in healthy adults[15] or in participants across a broader age range.[16] Moreover, the distribution of effect sizes in meta-analyses suggest publication bias, or that the reporting of bilingualism effects on executive functioning give a distorted view of the evidence.[16]

History[edit]

According to the Singapore Management University (SMU) School of Social Sciences, research before the 1960s on bilingual individuals varied but commonly supported the idea that there were disadvantages to bilingualism. Researchers believed that bilinguals would have smaller vocabularies and stunted cognitive abilities[17]. They also thought that children learning two languages at a young age would struggle differentiating and building proficiency in two languages to become competent in either.[18] The idea that being bilingual was harmful to a child's linguistic and cognitive development, persisted.[19][20] According to a historical review in "The Journal of Genetic Psychology," various researchers held these beliefs, noting a "problem of bilingualism" or the "handicapping influence of bilingualism."[21] Following studies reported that bilinguals performed worse in IQ tests and suffered in most aspects of language development.[18] These perspectives on bilingualism may have come from studies that did not control for socioeconomic status (SES) and gave IQ tests to non-proficient speakers of a second language in that second language.[22] Many of these studies also used unstandardized and subjective definitions of bilingualism and of a bilingual individual, labeling someone as bilingual or monolingual through assumptions based on parent national origin, or based on family name.[20][21]

Researchers began to change tone in the late 1950s/early 1960s, when Lenneberg, Chomsky, and Halle co-founded the field of biolinguistics and explored the role of biology in language.[23]. Their ideas led others to consider the role of human development more. In 1962, a turning point came about from a study that emphasized the importance of controlling for factors like age, sex, and SES, as well as of having a standardized measure for bilingualism when selecting a sample of bilinguals to be studied. Researchers carefully matched bilingual to monolingual participants and found that the bilinguals appeared to have significant advantages to that of their monolingual peers, outperforming in both verbal and non-verbal tests, more specifically in the non-verbal tests. In continuation of this study, research after this point began to shift focus, investigating areas of cognitive development and aptitude like perception and executive functioning.[18][21][24] In 1967, publication of Lenneberg's seminal book, Biological Foundations of Language, first introduced the idea of a critical period of language acquisition, now better known as a sensitive period and further influenced bilingualism ideas.[23] In 1977 the American Institutes for Research published an influential study which discussed bilingualism as it relates to education - how it affects a child's performance compared to peers.[25] This study played a large role in our understanding of multilingualism and the effects that it has on the brain.

Since the late 1970s, researchers have found more cognitive benefits of bilingualism, including better attention, task-switching, and protection against aging declines[12]. Over time, the prevalence of bilinguals in the United States has also increased. While the United States Census Bureau does not directly poll for bilingualism, they do poll for household languages. Non-English-speaking households are also surveyed for English proficiency. A 2012 interpretation of Census Bureau results observed that 11% of the population was bilingual in 1980, 14% in 1990, and 20% in 2012.[26]

Executive function[edit]

Executive function is the group of high-level cognitive processes that assists in goal-oriented tasks, such as problem solving, mental flexibility, attentional control, inhibitory control, and task switching.[27] Much of the current research on cognitive effects of bilingualism studies the potential relationship between bilingualism and executive function; monolinguals and bilinguals may have executive function differences[28]. Studies that match age and background factors like SES have found that bilinguals, who experience the mental demands of learning multiple languages, may have greater executive control and experience other cognitive benefits than their monolingual peers.[28][29][30] Executive function may also have effects for older adults. Adults who learned a second language at a young age show better control and inhibitory processing than monolingual adults, as well as greater protection from cognitive decline such as dementia.[28][31] Notably, some scientists continue to debate whether a bilingual advantage in executive functioning exists, with some studies and meta-analyses coming to opposite conclusions.[32]

Empirical findings - deleted this section as "executive function" section covers same content but in less jargon and less primary sources.[edit]

Bimodal bilinguals[edit]

Unimodal bilinguals are individuals who are proficient in two spoken languages. In contrast, bimodal bilinguals are individuals who are proficient in languages in differing modalities (i.e. a spoken and signed language). Studies have indicated that unimodal and bimodal bilinguals face different factors and requirements for their language use. In a monolingual conversational situation, unimodal bilinguals must suppress their use of one of their languages more significantly than bimodal bilinguals, while using the other language. This is because the use of a spoken word in another language would be confusing to the listener, whereas the use of a signed word would be less distracting to a listener, even when they do not know the meaning of the sign.[33]

In 1998, David Green proposed his "inhibitory control model",[34] which references a bilingual's constant need to suppress one language while using another. Because this task requires suppressing a source of distraction, this kind of control is then applied to other tasks. This assertion was bolstered by a study comparing unimodal bilinguals and bimodal bilinguals. Because bimodal bilinguals can express themselves in both languages at the same time, they may require less inhibition. This idea was supported by the results of the study; only unimodal bilinguals were found to have an advantage, as measured by the flanker task (a cognitive task that measures attentional focus and inhibition). Bimodal bilinguals also switch languages less frequently, because they are more likely to use both languages at once than to completely switch from one to the other. For this reason, the researchers of this study hypothesized that it may be the switching between languages that gives unimodal bilinguals the advantage.

Bilingualism vs. executive control[edit]

Hakuta and Diaz[35] addressed an origin question about the potential bilingual advantage: do children with greater cognitive abilities tend to learn more than one language, or could knowing more than one language contribute to enhanced cognition? They administered Raven's Progressive Matrices, a set of non-verbal tests designed to measure cognitive ability, to a bilingual sample of children. Results showed their sample had a higher correlation with the degree of bilingualism, or language proficiency, and test scores. Accordingly, this study suggested that the "egg came first," or that bilingualism predicts cognitive ability through performance. Furthermore, native bilinguals often learn a second language due to family environment, where use of the two languages is necessary. It is less likely that children learn second languages in monolingual households through individual, innate cognitive abilities.

Benefits in older age[edit]

There has been a growing research interest in the benefits of bilingualism against age-related cognitive decline.[31][36][37][38] Klein & Viswanathan[39] found that the normal decrease in attention control observed in older adults was reduced in bilinguals, suggesting that bilingualism may protect against age-related cognitive deficits. Elderly bilinguals show better task-switching skill, can ignore unrelated information, and can choose the best phrasing.[37] Bilingualism may be one of the environmental factors which contributes to 'cognitive reserve'.[40] Cognitive reserve is the idea that engaging in stimulating physical or mental activity can maintain cognitive functioning in healthy aging and delay the onset of dementia-related memory losses.[36] Contributing factors include education, occupational status, higher socioeconomic class, and doing physical, intellectual and social activities.[41][42][43]

To test the protection of bilingualism against Alzheimer's disease (AD), Bialystok et al. (2007)[37] examined hospital records of monolingual and bilingual patients who were diagnosed with various types of dementia. After controlling for various cognitive factors, the researchers found bilinguals experienced later onset of symptoms and were diagnosed approximately 3–4 years later on average than monolinguals. This was replicated with patients all diagnosed with AD.[44] Note that the studies did not show that bilingualism directly prevents one from having AD, but rather enables functional cognition for a longer period of time, delaying symptom onset for those with the disease. For example, in one Alzheimer study, bilinguals actually had more pathology (signs of disease) and damage than the monolingual patients.[45] This suggests that active use of the two languages protects against the symptoms of the disease. Areas of the brain that enable cognitive control may have benefited from the bilingual experience and so improve cognitive function in older age.

Several other studies[38] replicated the finding that bilingualism contributes to cognitive reserve. For example, Abutalebi et al. (2015)[46] used the flanker test to study unimodal bilinguals and monolinguals matched based on education level and SES. While this study had a relatively small sample size, the results did confirm previous research findings: the bilinguals outperformed the monolinguals on all experimental tasks, and the monolinguals' neural imaging showed more signs of age-related effects on performance of tasks and less gray matter density, which is associated with memory and function losses. Conversely, the bilinguals' neural imaging showed more gray matter density.[46]

The bilingualism advantage controversy[edit]

The idea that bilingualism enhances executive function is not universally accepted among researchers.[47][48][49][50] Mixed experimental results have led to bitter, opposing views.[47]

The research methodologies of both groups for and against bilingualism advantages have been disputed.[47] Some opposing researchers argue that correlations between bilingualism and executive function are inconsistent due to a reliance on findings with small sample sizes, publication bias[51], and non-uniform and definitions.[52][53] Furthermore, they argue that bilinguals are not consistently better at all executive function tasks[53] and existing studies only compare bilinguals to monolinguals, and not bilinguals of different proficiencies.[54] Conversely, researchers in support of a bilingualism advantage note that while tests of executive function may undermine the robustness of findings, opposing findings come from researchers outside of the bilingualism field, and new neuroimaging technologies robustly verify and build upon historical findings of a bilingualism advantage.[55][47][56]

Parallel activation of both languages[edit]

Bilinguals often have more knowledge in certain language domains[57], leading to a dominant "L1" language, and a less dominant "L2" language. Research shows that when a bilingual individual proficient in both uses only L1 or L2, both languages are simultaneously active, phonologically and semantically[58][59], and share overlapping neural representations[60][61][62] This activation is shown by electrophysiological measures of performance when listening to speech, reading words in either language or even planning speech in either language.[63][64] Bilingualism studies historically looked at languages that share the Roman alphabet, where co-activation of languages may make more intuitive sense. However, co-activation of L1 and L2 has also been reported in bilinguals whose two languages have different scripts (writing systems)[65], lexical forms (e.g. Japanese and English)[66], and modality (e.g. English and American Sign Language).[67]

The words "red, green, and blue" are shown in colors not associated with their names.
The Stroop task, which shows color names in a different color, tests inhibition and distraction.

The fact that both languages are constantly activated means that they potentially compete for cognitive resources; bilinguals need a way to control the competition, to not use the wrong language at the wrong time. Inhibition refers to being able to ignore irrelevant information and therefore not be distracted by non-target stimuli. Inhibition may be the executive control system that allows successful linguistic selection even when both languages are co-activated in bilinguals. De Groot & Christofells[68] (2006) proposed a distinction between two types of inhibition that may occur: global inhibition and local inhibition. Global inhibition refers to suppression of an entire language system, e.g. inhibiting Spanish when speaking English, and local inhibition refers to inhibition of a more specific competing vocabulary, e.g. the translation of the same word or phrase. Local inhibition mostly affects linguistic performance whereas global inhibition affects both linguistic and cognitive performance.

Inhibiting language in different ways may impact non-linguistic and lingustic cognitive processing. For example, a test that is widely used to assess this executive function is the Stroop task, where the word for a color is printed in a different color than the name (e.g. the word 'red' printed in blue ink). This causes interference and distraction; reaction times are measured to see how distracted the individual is by the incongruent word and color. Bilinguals compared to monolinguals have shown better Stroop task performance, suggesting that bilinguals have a more developed inhibition process, potentially due to the constant inhibition of their non-target language.[69][70][71]

Abilities related to executive function[edit]

Bilingual individuals have also shown advantages in metalinguistic ability, which seems closely tied to executive function. Metalinguistic awareness is the understanding of the separation between language's structure and its meaning. For example, being able to judge the grammaticality of a sentence regardless of whether it is sensical, or being able to separate the set of sounds comprising a word from the word's meaning. Metalinguistic awareness involves inhibition, or the ability to suppress distracting information such as semantics. Metalinguistic ability could also be exercised by being bilingual, given that a bilingual individual has to suppress their knowledge of another language system when operating in one of their languages.[72]

Improved theory of mind, which is the ability to understand someone else's thinking, has also been implicated in bilingualism. A meta-analysis in 2018 found that bilingual children performed better on a theory of mind test compared to monolingual children.[73]

Age of acquisition[edit]

deaf children who are exposed to one language from birth do not have language deprivation nor are they bilingual.

A debate within the linguistic community is whether the age of acquiring one's L2 has effects on the cognitive advantages.[74] Bilingual children who acquire an L2 early may develop executive function earlier, around age 3, compared to monolingual hearing children who develop executive function around age 4 or 5.[75] Native bilingual children who develop proficiency in L1 and L2 at the same time, perform better on executive function tasks such as the Attention Network Test, which measures attentional control, compared to their late bilingual and monolingual counterparts in studies controlled for age, verbal ability, and SES.[28][29][30][75]

Removed section on "non-native bilingualism"

Language use[edit]

Reworded first sentence: Leopold, a pioneer of child language and bilingualism research, made many research findings by observing his daughter's, Hildegard, language use.

Language structure and awareness[edit]

Rewording "arduous" to "difficult."

Added/reworded last few sentences, also removed reference to subsection that no longer exists: These areas are quite difficult for a child to learn, but with development through childhood, have been shown to increase the understanding the structure of language and introduce a greater awareness of meaning. Bilinguals develop what is referred to as metalinguistic awareness. [76][77]

Reading ability[edit]

Removed first sentence: "As an attempt to further analyze bilingualism as it relates to reading capability, there was another study done by Bialystok."

Removed "-ed": "If they could correctly matched"

Last sentence: changed "understand" to "use": Overall, the bilinguals seemed to use the representational principle earlier than monolinguals, meaning they were earlier prepared for literacy acquisition

Reworded for neutrality:

Bilingualism may also affect reading ability. Bialystok observed bilingual children's reading abilities and how the children made connections between the spoken and written language systems. Children were given a "Moving Word Task," where they needed to appropriately match a written word to an object on a card. Correctly matching the two after cards were rearranged suggested that the child could understand the written words as representations of specific words whose meanings cannot change.[78] Comparisons to monolinguals suggested a literacy advantage, as the bilingual children achieved scores equal to monolinguals one year older. This may be attributed to greater connections between spoken and written languages.[79] Other bilingual researchers found a relationship between phonological awareness and word recognition in native Spanish-speaking children learning to read English; phonological and word skills predicted how well a child could recognize English words.[80] This suggested bilinguals could apply phonological awareness developed in L1 to the reading ability in L2.

Vocabulary[edit]

Removing primary sources that are referenced in other secondary sources.

Past research suggests that bilinguals have a smaller vocabulary size than their monolinguals counterparts.[81] However, a 2022 meta-analysis casts doubt on this by showing that there are no linguistic costs in bilinguals who have acquired two languages early in life; rather the linguistic cost is mainly seen in L2 learners when tested in their second language.[82] Given that bilinguals accumulate vocabulary from both their languages, when taking both languages into account, they have a much larger vocabulary than monolinguals. However, within each language bilinguals have a smaller vocabulary size and take longer to name pictures as seen in standardized vocabulary tests, such as the Peabody Picture Vocabulary Test and Boston Naming task. A possible explanation may be that the frequency of use of words is related to increased lexical accessibility, meaning that words that are used more frequently are accessed more quickly.[81] Past research attributing proficiency differences between bilinguals and monolinguals from smaller vocabulary and language usage time may have too small of a focus within one language, and not broaden consideration to total knowledge in both languages. In addition, the need to select the appropriate language system makes ordinary linguistic processing more effortful. The simple act of retrieving a common word is more effortful for bilinguals than monolinguals due to the competition of the two languages.[81]

Bialystok, Luk, Peets, and Yang's study from 2010 notes that certain vocabulary tests could yield artificially low scores for bilingual children according to the domain from which the test words are taken. For example, the research team found that monolingual and bilingual 6-year-olds in their study had similar scores on English words that were associated with schooling. However, when the children were tested on English words that were associated with the home, the scores were significantly lower for the bilingual (English-Spanish) children. The researchers interpret this result as reflecting an asymmetry in vocabulary domains and language exposure: monolingual and bilingual children were equally exposed to the school context in the same language (English), but English was not commonly used in the home environments of the bilingual children. Language context may play a greater role in domain proficiency than overall language proficiency.[83]

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