Complexity as key to designing cognitive-friendly environments for older people

The lived environment is the arena where our cognitive skills, preferences, and attitudes come together to determine our ability to interact with the world. The mechanisms through which lived environments can benefit cognitive health in older age are yet to be fully understood. The existing literature suggests that environments which are perceived as stimulating, usable and aesthetically appealing can improve or facilitate cognitive performance both in young and older age. Importantly, optimal stimulation for cognition seems to depend on experiencing sufficiently stimulating environments while not too challenging. Environmental complexity is an important contributor to determining whether an environment provides such an optimal stimulation. The present paper reviews a selection of studies which have explored complexity in relation to perceptual load, environmental preference and perceived usability to propose a framework which explores direct and indirect environmental influences on cognition, and to understand these influences in relation to aging processes. We identify ways to define complexity at different environmental scales, going from micro low-level perceptual features of scenes, to design qualities of proximal environments (e.g., streets, neighborhoods), to broad geographical areas (i.e., natural vs. urban environments). We propose that studying complexity at these different scales will provide new insight into the design of cognitive-friendly environments

Urbanisation and cognitive ageing: an investigation of geographical variations in the cognitive health of older adults in Ireland

Ageing and urbanisation worldwide, and the increasing risk of chronic conditions such dementia and cognitive impairment with higher life expectancy, urge to understand the impact of city or rural living on healthy cognitive ageing. Based on the premise that environmental features influence cognition, my doctoral project investigated whether different levels of urbanisation supported specific cognitive skills in older age. Firstly, a thorough review of the literature identified environmental characteristics (e.g. urban vs. rural living, perceptual load caused by traffic or noise, presence of green) which could “train” the brain to maintain efficiency and age well. We proposed the concept of complexity to operationalise and measure the dynamic set of physical factors (encompassing a macro, meso and micro level of analysis) that make the lived environment optimally stimulating for cognitive functioning, and which could therefore be key contributors to cognitive-friendly environments. Using data from The Irish Longitudinal Study on Ageing (TILDA), the PhD project investigated macro (urban-rural living) and meso level (population density and accessibility to urban environments) geographical variations in multiple cognitive domains for approximately 5,000 healthy community-dwelling people age 50+, to test the hypothesis that in Ireland higher urbanisation (i.e., higher environmental complexity) would be associated with better performance. We found a positive association (cross-sectionally, but not longitudinally) between urbanisation and executive functions, a key cognitive skill to interact with the environment, in line with our hypothesis. Healthy lifestyles moderated geographical variations in global cognition, in line with research on cognitive reserve. This PhD research provides new evidence on the specific cognitive skills amenable to environmental influences, namely executive functions, and stimulates future work to identify neighbourhood characteristics which can ‘train’ executive functions in older age, with implications for the design of usable and cognitively stimulating places for older people

Cognitive and sensory dimensions of older people’s preferences of outdoor spaces for walking: A survey study in Ireland

Background: Physical exercise, particularly walking, benefits healthy ageing. Understanding the environmental circumstances in which exercise occurs is crucial to the promotion of physical activity in older age. Most studies have focused on the structural dimensions of environments that may foster walking; however, individual differences in how older people perceive and interact with outdoor spaces need further attention. This study explored the cognitive and sensory dimensions of preferences of outdoor spaces for walking. Methods: We invited 112 healthy community-dwelling people aged ≥60 years to complete a survey to test associations between walking preferences and cognitive/sensory vulnerability. A subsample also completed focus groups/walk along interviews to explore qualitatively the cognitive/sensory reasons for outdoor walking preferences. Results: While most participants indicated a preference for outdoor spaces that offer variety and greenery, we observed a complex association between individual cognitive/sensory needs (stimulation seeking vs. avoidance), preferences for social interactions, and the place of residence urbanity level. Furthermore, walking preferences varied based on the purpose of the walk (recreation vs. transportation). Conclusions: Our findings support an ecological approach to understanding determinants of physical activity in older age, which consider the interaction between individual cognitive processing and the environment

Reducing young drivers’ crash risk: Are we there yet? An ecological systems-based review of the last decade of research

The involvement of young novice drivers in road crashes and violations has remained a significant transport and public health issue worldwide. Despite extensive evidence that multiple individual, social, and environmental factors contribute to risk while driving, crashes among young novice drivers have decreased only marginally. There is a need to define clear indicators of risk as well as develop effective interventions. The current study reviews the literature on young novice drivers, including empirical studies, systematic reviews, and crash reports published over the past ten years to provide a synthesis of risk and protective factors across multiple domains, from individual characteristics, to social influences, to behavioural and social interventions, to the car and road environment. Adopting an ecological systems perspective, we discuss links between these domains to clarify the strongest indicators of risk for young novice drivers as compared to experienced drivers, and we collate the available evidence on social and environmental factors that can improve young drivers’ behaviour so to reduce the rate of their road crashes. Among the factors discussed, the incomplete maturation of cognitive skills crucial to safe driving (visual scanning, hazard anticipation, handling of in-vehicle distractions) and the higher susceptibility to social influences (especially peers and parents) emerged as the strongest determinants of discrepancies in performance between young novice and experienced drivers. Growing awareness of the complex array of factors intervening synergistically in young drivers’ risk, as well as technological advancements have led to the design of interventions with some level of effectiveness, however, further research and more robust programmes adopting ecological and holistic approaches are needed to fully address the young driver problem

Sometimes nature doesn't work: absence of attention restoration in older adults exposed to environmental scenes

Background/Study Context: An accumulating body of literature indicates that contact with natural settings can benefit health and wellbeing. Numerous studies support Attention Restoration Theory (ART), which suggests that even short exposure to nature, as opposed to urban environments, can promote attention restoration by stimulating soft fascination. However, it is unclear whether the restorative effects hold in aging. This study tested nature effect on cognitive restoration in older people.Methods: Utilizing the Sustained Attention to Response Task (SART), we explored changes in attentional performance in 75 healthy older individuals before and after exposure to either natural or urban scenes. We checked for age-related differences by comparing the older sample to a group of 21 young participants.Results: We found no effects of environmental exposure for either attentional accuracy, sensitivity to visual targets or reaction times. Our older participants had worse accuracy and slower reaction times than a younger control group who used the same paradigm.Conclusion: The results of our study conducted with older adults show no attention restoration effects in this population. Potential geographical/cultural moderators as wells as methodological considerations are discussed to provide insights for future studies on cognitive restoration in older age

Moving towards a multidimensional dynamic approach to nature and health: A bioavailability perspective

The benefits of exposure to nature for health and well-being have been demonstrated across multiple disciplines. Recent work has sought to establish one ‘dose’ or type of nature exposure that is universally beneficial, which has proven difficult. We use the principles of psychopharmacology to look beyond the use of dose as a concept for prescribing nature. Instead, we posit a multidimensional model of bioavailability of nature to shift the focus beyond universal effects, and instead consider the relationship between health and nature as dynamic, changeable and heavily contextual. We propose that the bioavailability of nature interactions is constructed through understanding route of administration, dose and concentration. By delineating the mechanisms of health benefit derived from the type of behavioural interaction (through being, doing and living), the route of administration of nature interactions may be highly variable not just between, but also within, individuals. We propose concentration as being a meeting between the subjective aspects of the individual and the subjective qualities of the nature at that specific time and place. We use a ‘green equation’, for mapping the processes and pathways that belie the interaction between the person and their environment. Here, the nature/health association as a dynamic interaction, and we operationalise this within a multidimensional construct of bioavailability. We provide an overview of this testable model and summarise with preliminary evidence as well as a research agenda for the future

Testing attention restoration in a virtual reality driving simulator

Objectives: Attention Restoration Theory (ART) suggests that walking or being in natural settings, as opposed to urban environments, benefits cognitive skills because it is less demanding on attentional resources. However, it is unclear whether the same occurs when the person is performing a complex task such as driving, although it is proven that driving through different road environments is associated with different levels of fatigue and may engage attention differently. The present study investigated whether exposure to rural vs. urban road environments while driving would affect attentional capacity in young people after the drive, in line with the classic ART paradigms. Methods: We asked 38 young participants to complete the Sustained Attention to Response Task (SART) before and after being exposed to a rural or urban road in a virtual reality environment while driving in a full vehicle immersive driving simulator. Changes in SART performance based on environmental exposure where explored in terms of target sensitivity, accuracy, reaction times, and inverse efficiency. We analyzed potential road type effects on driving speed and accuracy. Possible effects of driving on attention were tested by comparing the sample performance to that of a control group of 15 participants who did not drive and sat on the passenger seat instead. Results: Exposure to rural or urban road environments in the driving sample was not associated with any significant changes in attentional performance. The two exposure groups did not differ significantly in terms of driving behavior. Comparisons between the driving sample and the control group controlling for age indicated that participants who drove were more accurate but slower at the SART than those who were passengers. Conclusion: The present study does not support the hypothesis that a short drive in a natural setting may promote attention restoration as compared to an urban setting. Methodological considerations as well as recommendations for future research are discussed