Impact of maternal institutionalization on children's language development: A multidisciplinary study

Research has uncovered extensive negative effects of institutional rearing on development, including language deficits. However, less is known about how these effects may be passed down vertically from mothers to children. The current study examined this pathway with respect to language development using behavioral and neural measures. Participants were mother-child dyads (children aged 8-71 months) where the mothers were either previously institutionalized in orphanages (n = 20) or not (n = 34). Mothers qualified for the study if they were 16 to 35 years of age, had a child aged 8 months to 5 years, and were native Russian speakers. We hypothesized that mothers with a history of institutionalization would provide a linguistically impoverished environment, leading to lower language scores in their children and altered neural responses to language violations. Contrary to our hypotheses, maternal history of institutionalization was not significantly associated with child language abilities (expressive or receptive) or the frequency of conversational turns. However, mothers with a history of institutionalization spoke fewer words around their female offspring relative to mothers raised in biological families. Event-related potential (ERP) analyses revealed topography differences in children's P400 response during phonological processing associated with maternal institutionalization history. We were also able to predict with above-chance accuracy children whose mothers had a history of institutionalization using machine learning on ERP measures. These findings suggest the need for targeted interventions to support language development in children of mothers with a history of institutionalization.

The next 1000 days: building on early investments for the health and development of young children

Following the first 1000 days of life that span from conception to two years of age, the next 1000 days of a child's life from 2-5 years of age offer a window of opportunity to promote nurturing and caring environments, establish healthy behaviours, and build on early gains to sustain or improve trajectories of healthy development. This Series paper, the first of a two-paper Series on early childhood development and the next 1000 days, focuses on the transition to the next 1000 days of the life course, describes why this developmental period matters, identifies the environments of care, risks, and protective factors that shape children's development, estimates the number of children who receive adequate nurturing care, and examines whether current interventions are meeting children's needs. Paper 2 focuses on the cost of inaction and the implications of not investing in the next 1000 days. In low-income and middle-income countries (LMICs), only 62 million children aged 3 and 4 years (25·4%) currently receive adequate nurturing care during the next 1000 days, leaving 181·9 million children exposed to risks that jeopardise their healthy development. Inputs across nurturing care dimensions of health, nutrition, protection, responsive care, and learning vary substantially across countries. In LMICs, although 86·2% of children have a healthy weight in this period, less than one in three children have access to developmental stimulation or are protected from physical punishment, and only 38·8% have access to early childhood care and education services. Intervention research in LMICs in the next 1000 days is scarce. The continuity of developmentally appropriate nurturing care, coordination across health, education, and protection sectors, and the implementation of interventions to support caregivers and improve the quality of education and care remain top priorities in this period. These sectors play key roles in promoting quality early care and education for this age group, which will help maximise developmental potential and opportunities of children globally and help progress towards the achievement of the Sustainable Development Goals.

Language Development of Japanese Children Raised in Institutional Care

BACKGROUND

Nurturing environments have a critical influence on children's language development. It is unclear to what extent nurturing environments in institutions influence children's language development.

METHODS

The present study investigated the early lexical development in Japanese children raised in institutional care (IC) (N = 86; 10-33 months; 37 boys) and compared their lexical skills to a large sample of age peers being raised in biological family care (BFC) (N = 1897; 937 boys) using vocabulary checklists.

RESULTS

Our results present three main findings: (1) Japanese IC children did not exhibit a delay in productive vocabulary compared with BFC children, although their comprehensive vocabulary was delayed; (2) IC children who experienced maltreatment showed poorer vocabulary scores than non-maltreated IC children; (3) both the duration at the institution and the number of books read to them significantly predicted children's vocabulary scores.

CONCLUSION

Our study suggests that the Japanese institutions included in the present study did not show a negative impact, at least on productive vocabulary, and may competently foster children's language development. We discussed the relationship between institutional environments and children's language development.

Receptive and expressive vocabulary performance in 2- to 5-year-olds in care: The role of different care types and temperament

The detrimental role of institutionalization in children's development has prompted the introduction of alternative care types designed to offer more personalized care. The current study aimed to test whether children in alternative care types (care villages, care homes, and foster care) performed better on vocabulary than those in institutions. The role of temperament, specifically perceptual sensitivity and frustration, and the interaction between temperament and care types on vocabulary performance were also explored. The study involved 285 2- to 5-year-old children from different care types, and they were assessed through receptive and expressive vocabulary tests and temperament scales. The results of the linear mixed model revealed that children in alternative care types exhibited significantly higher vocabulary scores compared with those in institutions. Moreover, perceptual sensitivity showed a positive association with receptive and expressive vocabulary skills and seemed to act as a protective factor by mitigating the lower vocabulary scores in institutions. Frustration moderated vocabulary outcomes differently for children in institutions and foster care, aligning with the diathesis-stress model and vantage sensitivity theory, respectively. The findings emphasize the positive role of alternative care types in vocabulary performance and the importance of children's temperamental traits in this process.