Do parents have any important long-term effects on the development of their child's personality? This article examines the evidence and concludes that the answer is no. A new theory of development is proposed: that socialization is context-specific and that outside-the-home socialization takes place in the peer groups of childhood and adolescence. Intraand intergroup processes, not dyadic relationships, are responsible for the transmission of culture and for environmental modification of children's personality characteristics. The universality of children's groups explains why development is not derailed by the wide variations in parental behavior found within and between societies.

Where is the child's environment? A group socialization theory of development.

How social contexts support and shape language development

Advanced inhibitory control skills have been found in bilingual speakers as compared to monolingual controls (Bialystok, 1999). We examined whether this effect is generalized to an unstudied language group (Spanish-English bilingual) and multiple measures of executive function by administering a battery of tasks to 50 kindergarten children drawn from three language groups: native bilinguals, monolinguals (English), and English speakers enrolled in second-language immersion kindergarten. Despite having significantly lower verbal scores and parent education/income level, Spanish-English bilingual children's raw scores did not differ from their peers. After statistically controlling for these factors and age, native bilingual children performed significantly better on the executive function battery than both other groups. Importantly, the relative advantage was significant for tasks that appear to call for managing conflicting attentional demands (Conflict tasks); there was no advantage on impulse-control (Delay tasks). These results advance our understanding of both the generalizability and specificity of the compensatory effects of bilingual experience for children's cognitive development.

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Bilingual experience and executive functioning in young children.

A number of studies have documented the cognitive outcomes associated with bilingualism. To gain a clear understanding of the extent and diversity of these cognitive outcomes, the authors conducted a meta-analysis of studies that examined the cognitive correlates of bilingualism. Data from 63 studies (involving 6,022 participants) were extracted and analyzed following established protocols and procedures for conducting systematic reviews and guidelines for meta-analysis. Results indicate that bilingualism is reliably associated with several cognitive outcomes, including increased attentional control, working memory, metalinguistic awareness, and abstract and symbolic representation skills. Overall mean effect sizes varied from small to large, depending on the cognitive outcomes measured, and were moderated by methodological features of the studies.

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A Systematic Review and Meta-Analysis of the Cognitive Correlates of Bilingualism

In a previous study, a bilingual advantage for preschool children in solving the dimensional change card sort task was attributed to superiority in inhibition of attention (Bialystok, 1999). However, the task includes difficult representational demands to encode and interpret the task stimuli, and bilinguals may also have profited from superior representational abilities. This possibility is examined in three studies. In Study 1, bilinguals outperformed monolinguals on versions of the problem containing moderate representational demands but not on a more demanding condition. Studies 2 and 3 demonstrated that bilingual children were more skilled than monolinguals when the target dimensions were perceptual features of the stimulus and that the two groups were equivalent when the target dimensions were semantic features. The conclusions are that bilinguals have better inhibitory control for ignoring perceptual information than monolinguals do but are not more skilled in representation, confirming the results of the original study. The results also identify the ability to ignore an obsolete display feature as the critical difficulty in solving this task.

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Attention and inhibition in bilingual children: evidence from the dimensional change card sort task

This study compares lexical development in a sample of 25 simultaneous bilingual and 35 monolingual children for whom semilongitudinal data were collected between the ages of 8 and 30 months. A standardized parent report form, the MacArthur Communicative Development Inventory (1989), was used to assess the children's receptive and productive vocabulary in English and/or Spanish. A methodology was devised to assess the degree of overlap between the bilingual children's lexical knowledge in one language and their knowledge in the other. Using the measures presented here, there was no statistical basis for concluding that the bilingual children were slower to develop early vocabulary than was the monolingual comparison group. The wide range of vocabulary sizes observed at these ages in normally developing children (Fenson et al., 1991) was observed in these bilingual children as well. The close correspondence of the pattern of the bilinguals' growth in two languages at once to monolinguals' growth in one suggests that norms for lexical development in bilinguals should be made with reference to the children's performance in two languages together.

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Lexical Development in Bilingual Infants and Toddlers: Comparison to Monolingual Norms

The bilingual child is seen as a unique source of information about the relation between input and intake. The strength of the association between language exposure estimates and vocabulary learning was examined for 25 simultaneous bilingual infants (ages 8 to 30 months) with differing patterns of exposure to the languages being learned. Using the MacArthur Communicative Development Inventories, standardized parent report forms in English and Spanish, the percentage of all words that were known in each language was calculated and then plotted against the estimates of language input (also in percentages). A significant correlation was found, r(25) = .82, p < .001. The correlation was also strong when examined pointby-point, even for children whose language environments changed by more than 2O"7o between observations, although it was not reliable at lower levels of exposure to Spanish. Especially for children with less input in the minority language, the factors which appeared to affect the strength of the association between input and amount learned in a language are discussed.

The relation of input factors to lexical learning by bilingual infants

Bilingual children’s language and literacy is stronger in some domains than others. Reanalysis of data from a broad-scale study of monolingual English and bilingual Spanish–English learners in Miami provided a clear demonstration of “profile effects,” where bilingual children perform at varying levels compared to monolinguals across different test types. The profile effects were strong and consistent across conditions of socioeconomic status, language in the home, and school setting (two way or English immersion). The profile effects indicated comparable performance of bilingual and monolingual children in basic reading tasks, but lower vocabulary scores for the bilinguals in both languages. Other test types showed intermediate scores in bilinguals, again with substantial consistency across groups. These profiles are interpreted as primarily due to the “distributed characteristic” of bilingual lexical knowledge, the tendency for bilingual individuals to know some words in one language but not the other and vice versa.

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Profile effects in early bilingual language and literacy

Receptive vocabulary of Hispanic children in Miami was tested in both English and Spanish with complementary standardized tests, the Peabody Picture Vocabulary Test (PPVT-R) and the Test de Vocabulario en Imagenes Peabody (TVIP-H). 105 bilingual first graders, of middle to high socioeconomic status relative to national norms, were divided according to the language(s) spoken in their homes. Both groups, whether they spoke only Spanish in the home (OSH) or both English and Spanish in the home (ESH), performed near the mean of 100 in Spanish receptive vocabulary (TVIP-H means 97.0 and 96.5); in contrast, ESH group children scored more than 1 SD higher in English than OSH group children (PPVT-R means 88.0 and 69.7, respectively). It appears, therefore, that learning 2 languages at once does not harm receptive language development in the language of origin, while it does lay the groundwork for superior performance in the majority language. Furthermore, an analysis of translation equivalents, items shared by both tests, shows that a statistically significant portion of bilingual children's lexical knowledge does not overlap in their 2 languages and is therefore not reflected in single-language scores.

Measuring Bilingual Children's Receptive Vocabularies

A number of studies have shown that approximately one-quarter of children in potentially bilingual environments do not become bilingual. This article explores several key factors that influence the likelihood that a child who has access to interactions in two languages will learn them both. The five factors discussed are input, language status, access to literacy, family language use, and community support, including schooling. It is argued that the quantity of input has the greatest effect on whether a minority language will be learned, but language status and attitudes about language also play a role. When families are proactive and provide daily activities for children in the minority language, the children respond by learning it. In addition, dual-immersion, “two-way” schooling is shown to benefit children's level of language proficiency in the minority language without diminishing their progress in the community language.

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Barbara Zurer Pearson

Papers

Lexical Development in Bilingual Infants and Toddlers: Comparison to Monolingual Norms

The relation of input factors to lexical learning by bilingual infants

Profile effects in early bilingual language and literacy

Measuring Bilingual Children's Receptive Vocabularies

Social factors in childhood bilingualism in the United States