The role of neighbourhood greenspace in children's spatial working memory

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Abstract

Background Exposure to nature may be particularly beneficial for the brain regions that support spatial working memory, a strong correlate of academic achievement. Aims To explore whether children living in greener neighbourhoods (wards) have better spatial working memory. Sample Drawn from the UK's Millennium Cohort Study, the sample was 4,758 11‐year‐olds living in urban areas in England. Methods We fitted two‐level regression models, with children nested in wards, before and after adjustment for confounders, including poverty, parental education, sports participation, neighbourhood deprivation, and neighbourhood history. Spatial working memory was measured using the Cambridge Neuropsychological Test Automated Battery Spatial Working Memory task. Greenspace was measured as the percentage of greenery in the child's ward. Results Even after controlling for confounders, lower quantity of neighbourhood greenspace was related to poorer spatial working memory. Importantly, neighbourhood deprivation did not modify this relationship. Therefore, lower quantity of greenspace was related to poorer spatial working memory similarly in deprived and non‐deprived neighbourhoods. Conclusions Children living in greener urban neighbourhoods have better spatial working memory. If this association is causal, then our findings can be used to inform policy decisions about both education and urban planning.

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Green space, urbanity, and health: how strong is the relation?

Jolanda Maas, Robert A. Verheij, Peter Groenewegen … (2006)

To investigate the strength of the relation between the amount of green space in people's living environment and their perceived general health. This relation is analysed for different age and socioeconomic groups. Furthermore, it is analysed separately for urban and more rural areas, because the strength of the relation was expected to vary with urbanity. The study includes 250 782 people registered with 104 general practices who filled in a self administered form on sociodemographic background and perceived general health. The percentage of green space (urban green space, agricultural space, natural green space) within a one kilometre and three kilometre radius around the postal code coordinates was calculated for each household. Multilevel logistic regression analyses were performed at three levels-that is, individual level, family level, and practice level-controlled for sociodemographic characteristics. The percentage of green space inside a one kilometre and a three kilometre radius had a significant relation to perceived general health. The relation was generally present at all degrees of urbanity. The overall relation is somewhat stronger for lower socioeconomic groups. Elderly, youth, and secondary educated people in large cities seem to benefit more from presence of green areas in their living environment than other groups in large cities. This research shows that the percentage of green space in people's living environment has a positive association with the perceived general health of residents. Green space seems to be more than just a luxury and consequently the development of green space should be allocated a more central position in spatial planning policy.

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Green spaces and cognitive development in primary schoolchildren.

Payam Dadvand, Mark Nieuwenhuijsen, Mikel Esnaola … (2015)

Exposure to green space has been associated with better physical and mental health. Although this exposure could also influence cognitive development in children, available epidemiological evidence on such an impact is scarce. This study aimed to assess the association between exposure to green space and measures of cognitive development in primary schoolchildren. This study was based on 2,593 schoolchildren in the second to fourth grades (7-10 y) of 36 primary schools in Barcelona, Spain (2012-2013). Cognitive development was assessed as 12-mo change in developmental trajectory of working memory, superior working memory, and inattentiveness by using four repeated (every 3 mo) computerized cognitive tests for each outcome. We assessed exposure to green space by characterizing outdoor surrounding greenness at home and school and during commuting by using high-resolution (5 m × 5 m) satellite data on greenness (normalized difference vegetation index). Multilevel modeling was used to estimate the associations between green spaces and cognitive development. We observed an enhanced 12-mo progress in working memory and superior working memory and a greater 12-mo reduction in inattentiveness associated with greenness within and surrounding school boundaries and with total surrounding greenness index (including greenness surrounding home, commuting route, and school). Adding a traffic-related air pollutant (elemental carbon) to models explained 20-65% of our estimated associations between school greenness and 12-mo cognitive development. Our study showed a beneficial association between exposure to green space and cognitive development among schoolchildren that was partly mediated by reduction in exposure to air pollution.

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Directed Attention as a Common Resource for Executive Functioning and Self-Regulation.

Stephen Kaplan, Marc Berman (2010)

Research on executive functioning and on self-regulation have each identified a critical resource that is central to that domain and is susceptible to depletion. In addition, studies have shown that self-regulation tasks and executive-functioning tasks interact with each other, suggesting that they may share resources. Other research has focused specifically on restoring what we propose is the shared resource between self-regulation and executive functioning. Utilizing a theory-based natural environment intervention, these studies have found improvements in executive-functioning performance and self-regulation effectiveness, suggesting that the natural environment intervention restores this shared resource.