We assessed the effects of three factors on recovery from extinction in patients with lesions including the posterior parietal lobe: (a) whether objects were frequently used together in action versus whether they could be used in action together; (b) whether there was an effect of positioning objects for action; and (c) whether the surface properties of objects mediated performance. There was greater recovery from extinction for objects used frequently together, along with effects produced by objects that could be used together. There were also positive effects of correctly positioning objects for action. There were no effects of surface information on the benefit of reporting both members of a pair, though there were some effects on error trials. The results provide positive evidence for an effect on attention of affordances based on objects falling in plausible co-locations for action. Such affordances may also be influenced by the frequency with which objects are used together and can be generated from edge-based representations of objects (surface colour and depth are not necessary). However, surface-based representations may influence the speed with which action-related properties of objects engage attention.

A growing body of literature has established a relationship between neighborhood perceptions and both physical and mental health outcomes, yet there remains a need to further explicate possible psychosocial factors that are predictive of neighborhood perceptions. This study hypothesized that an increase in social integration would result in more positive neighborhood perceptions.Propensity score matching on social integration was employed to strengthen the ability to draw a causal inference about the effect on neighborhood perceptions.When controlling for a range of sociodemographic covariates-including area deprivation index as a measure of objective neighborhood conditions-high social integration accounted for more than a 7% increase in neighborhood perceptions. The findings indicate the role of social integration as a predictor of neighborhood perceptions, revealing the potential importance of interventions and mechanisms aimed at improving neighborhood perceptions via social integration for the purposes of improving physical health and mental wellbeing.

Background and Objectives Social isolation, and its associated health implications, is an important issue for older adults in the United States. To date, there has been limited study of the pathways that connect these two factors. The present study expands on previous models by linking factors related to the built environment—in the form of housing unit type—to perceived social isolation among those living independently in dedicated senior housing. Research Design and Methods The causal inference technique of inverse probability weighting with regression adjustment was employed to assess the impact of living in a townhome-style unit, as opposed to in an apartment building, on self-reported perceived social isolation (N = 1,160). Results Individuals who lived in townhome-style housing reported 10.4% lower probability of experiencing social isolation as a result of living in a townhome-style unit as opposed to an apartment building-style unit. Discussion and Implications The findings provide evidence for the conceptual model that characteristics specific to a given housing unit type may create conditions that exacerbate or buffer individuals from experiencing social isolation. This, in turn, has important implications for the targeting of interventions for social isolation. Policy considerations related to the type of affordable senior housing being built should also be informed by these findings. Additionally, future research should better explicate the role of housing unit type on mental and emotional health outcomes.

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