Higher Socioeconomic Status Households Research Articles

70 Childhood SES and Midlife CVD on Late-life Cognition

Objective:Cardiovascular disease (CVD) is a well-known risk factor for cognitive impairment and dementia, particularly among minoritized groups that have experienced a history of low childhood socioeconomic status (SES). Although previous literature has linked all levels of SES to varying degrees of stress exposure, children raised in higher SES households have more access to resources and services that encourage optimal growth and development than children who grow up in lower SES households. Given the disproportionate burden of dementia and cognitive deficits within minoritized groups, the present study examined whether childhood SES is associated with later life cognition among Black and White older adults and if this association persists after accounting for hypertension, a possible mediator of the relationship between childhood SES.Participants and Methods:1,184 participants were from the first wave of the STAR (n = 397 Black [Mage= 75.0 ±6.8 years]) and KHANDLE (386 Black [Mage= 76.2 ±7.2 years] and 401 White [Mage= 78.4 ±7.5 years]) cohorts. We used general linear models to examine the relationship between childhood SES and later-life executive function, semantic memory, and verbal memory scores, and midlife hypertension. Childhood SES was measured by self-reported perceived financial status (with participants given the following options: ‘pretty well off financially’, ‘about average’, ‘poor’, or ‘it varied’). These models were assessed in the full sample and also stratified by race.Results:In the full sample, childhood financial status was not associated with semantic memory, verbal episodic memory, or executive function. Financial status was associated with semantic memory in Black adults (β = -.124, t(771) = -2.52, p = .01) and this association persisted after accounting for hypertension (β = -.124, t(770) = -2.53, p = .01). There was no association between childhood financial status and later life semantic memory among White adults. There was no association between childhood financial status and later life verbal episodic memory or executive function in either Black or White adults in models with or without adjustment for hypertension.Conclusions:Our findings showed no relationship between childhood SES and cognition, except for semantic memory in Black participants; this relationship persisted after accounting for midlife CVD. Future analyses will assess both direct and indirect effects of more predictive measures of childhood SES on late-life cognition with midlife CVD as a mediator.

Does COVID-19 persistently affect educational inequality after school reopening? evidence from Internet search data in China.

The literature has extensively documented how Covid-19 affects educational inequality, but it remains unclear whether such an effect persists after school reopening. This paper attempts to explore this issue by investigating the search gap for learning resources in China. I categorized learning resources into four types: "school-centered resources", "parent-centered resources", "online tutoring agencies resources" and "in-person tutoring agencies resources". Using Internet search data, I found that nationwide search intensity for learning resources surged when schools were closed, and such search behaviors remained after schools reopened. I also found that high socioeconomic status households had better access to school- and parent-centered resources, and online tutoring resources, even after schools reopened. Given its persistent impact on learning, the pandemic will likely widen educational inequality over extended periods.

Packaged foods purchased on price promotion in Australia

We examined the prevalence and magnitude of price promotions among purchases of packaged foods and beverages in Australia, as well as the contribution of price-promoted foods and beverages to apparent energy intake. We utilized grocery purchase data from a nationally representative panel of 10 000 households in 2019 (NielsenIQ Homescan panel), combined with a food nutrition dataset (FoodSwitch). Nutritional quality was defined using the Australian and New Zealand Health Star Rating (HSR), where products with an HSR <3.5 were classified as ‘less healthy’ and products with an HSR ≥3.5 were classified as ‘healthy’. Apparent energy intake was expressed as the total energy content of all purchased products per day per capita. Price promotions were claimed by panel members. Overall, four-in-ten packaged products (41%) were purchased on price promotion. Compared to ‘healthy’ products, ‘less healthy’ products were more frequently purchased on price promotion (33% vs 48%, respectively, p < 0.001), but had a similar mean magnitude of price discount (both 22%). Low socio-economic status (SES) households consumed 18% more energy from ‘less healthy’ packaged products on price promotion than high SES households (1141 vs 970 kJ/day/capita, p < 0.001). In conclusion, restricting price promotions for ‘less healthy’ packaged foods and beverages could potentially improve diet quality and dietary inequalities in Australia.

The relationships between socioeconomic status, dietary knowledge and patterns, and physical activity with adiposity in urban South African women

Background: This cross-sectional study examined the relationship between socioeconomic status (SES), dietary knowledge and patterns, and physical activity level with body mass index of urban South African young women. Methods: Data were collected on 160 black South African women (aged 18–24 years) and included household SES, food frequency and nutritional knowledge questionnaires, self-reported physical activity and anthropometry. To assess household SES index, 1–7 assets were categorised as a lower household SES and those with 8–13 assets as a higher household SES. Structural equation modelling analysis was used to determine the direct, indirect and total effects on adiposity of household SES, age, education, nutrition knowledge score, dietary patterns and physical activity. Results: The prevalence of overweight and obesity was similar among women from high SES households compared with their low SES peers (48.4 vs. 44.8%). More than half (53%) of the women had poor dietary knowledge. Women from low SES households spent more time in moderate to vigorous intensity exercise (MVPA) compared with their high SES counterparts. Two distinct dietary patterns (Western and mixed) were identified. SEM results show that a unit increase in adherence to the ‘Mixed’ dietary pattern compared with ‘Western’ was associated with a 0.81 lower BMI kg/m2 (95% CI −1.54; −0.08), while ≥ 150 minutes’ MVPA per week was associated with a 1.94 lower BMI kg/m2 (95% CI −3.48; −0.41). Conclusion: The associations of SES, diet and physical activity on BMI must be taken into account when developing and designing interventions that target improvement in young women’s health.

The neglected epidemic-Risk factors associated with road traffic injuries in Mozambique: Results of the 2016 INCOMAS study.

In 2019, 93% of road traffic injury related mortality occurred in low- and middle-income countries, an estimated burden of 1.3 million deaths. This problem is growing; by 2030 road traffic injury will the seventh leading cause of death globally. This study both explores factors associated with RTIs in the central region of Mozambique, as well as pinpoints geographical "hotspots" of RTI incidence. A cross-sectional, population-level survey was carried out in two provinces (Sofala and Manica) of central Mozambique where, in addition to other variables, the number of road traffic injuries sustained by the household within the previous six months, was collected. Urbanicity, household ownership of a car or motorcycle, and socio-economic strata index were included in the analysis. We calculated the prevalence rate ratios using a generalized linear regression with a Poisson distribution, as well as the spatial prevalence rate ratio using an Integrated Nested Laplace Approximation. The survey included 3,038 households, with a mean of 6.29 (SD 0.06) individuals per household. The road traffic injury rate was 6.1% [95%CI 7.1%, 5.3%]. Urban residence was associated with a 47% decrease in rate of injury. Household motorbike ownership was associated with a 92% increase in the reported rate of road traffic injury. Higher socio-economic status households were associated with a 26% increase in the rate of road traffic injury. The rural and peri-urban areas near the "Beira corridor" (national road N6) have higher rates of road traffic injuries. In Mozambique, living in the rural areas near the "Beira corridor", higher household socio-economic strata, and motorbike ownership are risk factors for road traffic injury.

Social inequality influences the impact of household air pollution on birth outcomes

BackgroundStudies demonstrated associations between maternal exposure to household air pollution from cooking and increased risk of adverse birth outcomes in offspring; however, the modifying effect of socioeconomic status (SES) on this association has not been explored. ObjectivesIn a cohort of pregnant women with 800 single live births between 2016 and 2017 in rural and semi urban areas of Bangladesh, we tested the hypotheses that kitchen location and cooking fuel type affect birth outcomes (birth weight, low birth weight [LBW] and small for gestational age [SGA]) and these associations vary by SES. MethodsDemographic characteristics including SES, kitchen location and fuel type were assessed in prenatal visits. Neonatal anthropometric measurements were recorded within 72 h of births. We performed multivariable linear and logistic regressions adjusting for potential confounders to test the study hypotheses. ResultsFor newborns from households with indoor kitchens, adjusted mean birth weight was 65.13 g (95% confidence interval [CI]: −118.37, −11.90) lower and the odds of LBW and SGA were 58% (odds ratio [OR]:1.58, 95% CI: 1.12, 2.24) and 41% (OR: 1.41, 95% CI: 1.05, 1.92) higher compared to those born in households with outdoor kitchens. We found SES significantly modified the associations between kitchen location and birth outcomes in households using biomass fuels. Newborns from low SES households with indoor kitchens had 89 g lower birth weight and a higher odds of being born with LBW (OR: 2.08, 95% CI 1.23, 3.58), and SGA (OR: 1.70, 95% CI 1.06, 2.76) than those born in high SES households using outdoor kitchens. ConclusionsIn areas with poor access or affordability to clean fuel such as in our study population, cooking in an outdoor kitchen can reduce the burden of LBW and SGA, particularly for low SES households. Promoting outdoor kitchens is a possible intervention strategy to mitigate adverse birth outcomes.

Influence of socioeconomic status on academic performance in virtual classroom settings

As the children of immigrant parents, we understand the significant extent to which education is a tool for becoming contributing global citizens. During the COVID-19 pandemic, witnessing first-hand how socioeconomic inequalities were affecting education, we were determined to make a difference. We conducted an online survey to evaluate the impact of household socioeconomic status (SES) on student participation and performance in distance learning at the height of the COVID-19 in communities along the Monterey Bay Peninsula. SES is defined as the combined measure of gross income, educational attainment, and occupation. We hypothesized that students from low-socioeconomic households lacking resources and safe and supportive learning atmospheres would seldom participate during distance learning; therefore, earn lower grade point averages (GPAs) than students from higher SES households. We surveyed students from neighboring high schools whose student bodies are separated by a vast wealth gap, and utilized a novel scoring system to quantify the responses specifically for SES and direct participation factors (e.g., unmuting to participate in a class discussion and typing answers into the chat). The results suggested that high SES for Carmel High School and low SES for Monterey High School had a substantial impact on student achievement during distance learning. The average participation score for Carmel students was statistically significantly greater than Monterey students. Furthermore, students from the upper SES range attained higher weighted GPAs. This work ultimately reveals the inequality present in our current education system and the negative implications for low SES students in the online learning environment.

Nutrition and health-seeking practices during pregnancy and lactation and potential strategies to increase micronutrient intakes among women in northern Lao PDR.

Access to and utilisation of antenatal care (ANC) is important for optimising health and nutrition during pregnancy. This study aimed to assess adherence to and factors associated with ANC and antenatal supplement use among Laotian women, and consider culturally appropriate strategies to increase micronutrient intakes. Mother-child (aged 21 d to <18 months) dyads (n 699) enrolled in a hospital-based prospective cohort study with the community comparison group in Luang Prabang province were interviewed about their antenatal history, supplement use, household sociodemographic and dietary practices, including postpartum food avoidances. Ninety percent of women (mean age 24⋅7 ± 6⋅3 years) reported receiving ANC during their pregnancy, with the majority reporting four to seven contacts, while 84⋅6 and 17⋅3% reported supplement use during pregnancy and lactation, respectively. Adequate ANC contacts (≥8) and supplement use was more likely among women with complete primary education and from higher socioeconomic status households, and less likely among women belonging to ethnic minority populations and those who delivered their child at home. All women continued to consume salt while adhering to postpartum food avoidances; however, 58⋅5 and 38⋅7% of habitual consumers restricted fish and soy sauces, respectively. Eighty-six percent of women reported they would be willing to take supplements when adhering to postpartum dietary restrictions. Overall, women's reported ANC attendance and antenatal supplement use was suboptimal. Understanding predictors of and barriers to ANC and supplement use may help implement effective public health strategies to improve adherence. Alongside targeted supplementation, salt fortification with micronutrients may be a viable population-wide intervention that needs further evaluation.

Diet diversity of urban households in India during the COVID-19 lockdown.

Background: The nature of the COVID-19 pandemic forced several nations to impose country-wide lockdowns. The lockdown impacted several aspects of life including the economy. Food security became a growing concern for many households. Aim: The aim of the study was to explore the diet diversity of urban households in India during the nationwide COVID-19 lockdown. Methods: Information regarding socioeconomic status (SES), family size and information regarding availability and access to food were gathered from 450 households. Diet diversity was assessed using a 69-item food frequency questionnaire. Food variety scores (FVS) were computed for individual food groups and overall. Results: The majority of the households (86.4%) belonged to the upper-middle or upper SES. Households did not experience any constraints in accessibility and availability of food except the meat group. Overall, 84% of the households had low FVS for most of the food groups except for sugar and milk and milk products. The household SES score was positively associated with the milk FVS (B = 0.039, p = 0.020) and negatively with the fat FVS (B = -0.062, p < 0.001). The number of adults (B = 6.773, p < 0.001) in the household positively predicted the FVS of cereal, vegetable, fruit, fat and total FVS. Conclusions: The higher SES households in urban India did not experience food insecurity. Despite this, their poor diet diversity is a serious cause for concern, especially in the wake of the evolving pandemic. This highlights the need to promote consumption of a diverse variety of foods.

Socio-economic status, resilience, and vulnerability of households under COVID-19: Case of village-level data in Sichuan province.

This paper investigates economic impacts of COVID-19 on households based on differences in the socio-economic status (SES). We determine the household-level effects of the COVID-19 shock using income sources, types of industries, communities’ resilience, household susceptibility, and relevant policy measures. For this purpose, we used primary data of 555 households collected through snowball sampling technique using an online survey questionnaire from different villages mostly located in Sichuan Province, China. Using step-wise binary logistic regression analysis, we estimated and validated the model. Results suggest the use of SES as a better measure for understanding the impacts of COVID-19 on different households. We find that households with low SES tend to depend more on farmland income and transfer payments from the government. Contrarily, high SES households focus more on business and local employment as sources of income generation. Poor households were less resilient and more likely to fall back into poverty due to COVID-19, while the opposite stands true for non-poor households with high SES. Based on the estimations, policies encouraging employment and businesses complemented with loans on lower interest rates are recommended, which may increase the SES, thus minimizing vulnerability and enhancing the households’ resilience towards poverty alleviation and economic shocks.

Indoor Air Quality, Information, and Socio-Economic Status: Evidence from Delhi

Delhi faces some of the world’s highest concentrations of PM2.5, the most damaging form of air pollution. Although awareness of outdoor air pollution is rising across the world, there is limited information on indoor air pollution (IAP) levels, particularly in heavily polluted cities like Delhi. Even less evidence exists on how IAP varies by socio-economic status (SES), and whether or not addressing information gaps can change defensive investments against IAP. In this paper, we deploy Indoor Air Quality Monitors (IAQMs) in thousands of Delhi households across varying socio-economic strata in order to document IAP levels during the peak wintertime air pollution period. Across high and low SES households, we document indoor PM2.5 levels that are: (1) extraordinarily high — more than 20 times World Health Organization (WHO) standards; (2) only 10 percent lower in high (versus low) SES households; and (3) significantly higher than levels reported by the nearest, outdoor government monitors, the main source of public information on air pollution in this setting. We then report on a field experiment that randomly assigned IAQMs, as well as an opportunity to rent an air purifier at a subsidized price, across medium and high SES homes during the 2019-20 winter season.

Positive Economic, Psychosocial, and Physiological Ecologies Predict Brain Structure and Cognitive Performance in 9-10-Year-Old Children.

While low socioeconomic status (SES) introduces risk for developmental outcomes among children, there are an array of proximal processes that determine the ecologies and thus the lived experiences of children. This study examined interrelations between 22 proximal measures in the economic, psychosocial, physiological, and perinatal ecologies of children, in association with brain structure and cognitive performance in a diverse sample of 8,158 9–10-year-old children from the Adolescent Brain Cognitive Development (ABCD) study. SES was measured by the income-to-needs ratio (INR), a measure used by federal poverty guidelines. Within the ABCD study, in what is one of the largest and most diverse cohorts of children studied in the United States, we replicate associations of low SES with lower total cortical surface area and worse cognitive performance. Associations between low SES (<200% INR) and measures of development showed the steepest increases with INR, with apparent increases still visible beyond the level of economic disadvantage in the range of 200–400% INR. Notably, we found three latent factors encompassing positive ecologies for children across the areas of economic, psychosocial, physiological, and perinatal well-being in association with better cognitive performance and the higher total cortical surface area beyond the effects of SES. Specifically, latent factors encompassing youth perceived social support and perinatal well-being were positive predictors of developmental measures for all children, regardless of SES. Further, we found a general latent factor that explained relationships between 20 of the proximal measures and encompassed a joint ecology of higher social and economic resources relative to low adversity across psychosocial, physiological, and perinatal domains. The association between the resource-to-adversity latent factor and cognitive performance was moderated by SES, such that for children in higher SES households, cognitive performance progressively increased with these latent factor scores, while for lower SES, cognitive performance increased only among children with the highest latent factor scores. Our findings suggest that both positive ecologies of increased access to resources and lower adversity are mutually critical for promoting better cognitive development in children from low SES households. Our findings inform future studies aiming to examine positive factors that influence healthier development in children.

Built environment correlates of overweight and obesity among adults in Chennai, India

ABSTRACT Overweight and obesity are steadily rising in South Asia, the world’s most populous region. India, a low- and middle-income country in South Asia is experiencing an obesity epidemic. Built environment features may profoundly influence physical activity and counter the risk from overweight and obesity. This cross-sectional study investigated built environment correlates of overweight and obesity among adults (N = 370, 47.2% female, mean age = 37.9 years) in Chennai, India. Participants from low-socioeconomic status households were more likely to be overweight/obese (odds ratio [OR] = 1.8, 95% confidence interval [CI] = 1.1–2.9) than participants from high-socioeconomic status households. Driving to work predicted a three-fold increase in overweight or obesity compared to active commuting (OR = 2.9, 95%CI = 1.3–6.4). Household car ownership was linked with an increased likelihood of overweight or obesity (OR = 1.5, 95%CI = 0.7–3.2). Low walkability neighbourhoods significantly predicted an increase in odds of overweight or obesity (OR = 1.8, 95%CI = 1.1–2.8). By 2030, Indian cities are projected to add 250 million people accompanied by a 9.9% annual motor vehicle growth rate. As car ownership increases across Southern Asia, there is an urgent need to develop interventions to promote physical activity.

The Psychology of Entrenched Privilege: High Socioeconomic Status Individuals From Affluent Backgrounds Are Uniquely High in Entitlement.

As rates of intergenerational social mobility decline, it is increasingly important to understand the psychological consequences of entrenched socioeconomic privilege. Here, we explore whether current and childhood socioeconomic status (SES) are interactively related to entitlement, such that among currently high SES individuals, those from affluent backgrounds are likely to feel uniquely high levels of entitlement, whereas currently low SES individuals feel low entitlement regardless of their backgrounds. A meta-analysis of four exploratory studies (total N = 3,105) found that currently high SES individuals who were also raised in high SES households were especially inclined to report feeling entitled, a pattern that was robust across three indicators of SES: income, education, and subjective SES. Results of a preregistered, confirmatory study (N = 1,058) replicated this interactive pattern for education and subjective SES, though not for income. Our findings highlight the importance of considering current and childhood SES jointly to understand the psychological consequences of SES.

Association of Socioeconomic Status With Childhood Anemia Among Infant, Toddler, and Preschool Children in Bangladesh

ObjectivesThis study aims to delineate the association between economic inequality, along with other confounders, and anemia among infants, toddlers, and preschool children. MethodsFrom the 2011 Bangladesh Demographic Health Survey, a cross-sectional population sample comprising 2068 children between ages 6 and 59 months were selected for this study. Analyses were performed with a proportional odds model and finally stratified with the child age groups. ResultsInfants belonging to a low and medium socioeconomic status (SES) have approximately a 3-fold higher chance of being affected by mild, moderate, or severe anemia compared with infants of high SES (odds ratio [OR] 2.94; 95% CI 1.09-7.91; P=.03 and OR 2.76; 95% CI .87-8.82; P=.08, respectively). Preschool children from low and medium SES households are 2.73× (95% CI 1.20-6.18; P=.02) and 2.47× (95% CI .99-6.14; P=.04) more likely to be anemic compared with their counterparts from higher SES households. The place of residence and childhood stunting are associated with childhood anemia (urban vs rural: OR 1.27; 95% CI .21-.35; P = .04; and stunted vs normal: OR 1.34; 95% CI 1.11-1.63; P = .003). Besides, vitamin A supplementations appear to serve as protective agents against the occurrence of the childhood anemia (OR 1.18; 95% CI .99-1.41; P = .06). ConclusionUrgent preventive measures are needed to control the impending childhood anemia among infants and preschool children, especially in the low and medium SES households (ClinicalTrials.gov Identifier: NCT03126253).

Environmental injustice and Hurricane Harvey: A household-level study of socially disparate flood exposures in Greater Houston, Texas, USA

Environmental justice research on flooding has relied heavily on analyses of aggregated geographic areal units and assessing exposure to ‘pre-flood’ risks (e.g., residence in 100-year flood zones) rather than actual flood events. To address these limitations, we examined disproportionate exposure to flooding caused by Hurricane Harvey in 2017 in Greater Houston (Texas). Using primary survey data collected from 377 representative households before Harvey and spatial data on Harvey-induced inundation developed by the US Federal Emergency Management Agency, we found that the areal extent of flooding around residents' home sites was distributed inequitably with respect to race/ethnicity and socioeconomic status (SES). Hispanic, black and other racial/ethnic minority households experienced more extensive flooding than white households, and lower SES households faced more extensive flooding than higher SES households. Findings align with prior flood risk research in Greater Houston and provide cause for concern, as social inequities in flood exposure may have influenced social disparities in flood impacts and post-disaster needs. Since flood events in Greater Houston are expected to increase in frequency and magnitude due to climate change, socially disparate impacts are likely to become an increasingly salient public policy issue. Thus, proactive approaches for reducing flood risks and ameliorating disparities should be implemented.

Constrained school choice in Egypt

This paper examines patterns of school choice in Egypt from primary through higher education. We use a mixed-methods approach, combining survey data with qualitative in-depth interviews to explore schooling decisions. We find that attendance of private education institutions has increased over time but only at the university level. Azhari (Islamic religious) school attendance at the pre-university level has increased over time. Multivariate models show that girls are more likely than boys to attend public schools. Students from higher socio-economic status households are the most likely to attend private schools, while Azhari schools are attended by students of diverse socio-economic backgrounds. Yet in most geographic areas school “choice” at the pre-university level is effectively limited to public schools. When choices are available, qualitative data indicate that families still tend to prefer public schools due to their low cost, although private and religious schools are generally perceived to be of higher quality.

Effects of National Health Insurance on household out-of-pocket expenditure structure

Achieving universal health insurance coverage is a major objective for many countries. Taiwan implemented its National Health Insurance (NHI) program with universal coverage in 1995. This study investigates whether the NHI program affects the level and structures of out-of-pocket (OOP) health expenditures. We used data from the Taiwan Survey of Family Income and Expenditure released by the Directorate-General of Budget, Accounting and Statistics. We identified a case and a control group and then employed coarsened exact matching to match the two groups using several available variables. We then conducted a difference-in-difference analysis and determined that there was a statistically significant negative effect on OOP expenditure that was attributable to NHI (a reduction of 2.11 percentage points in total household expenditure). The largest reductions were found in health care services (−1.63%) and pharmaceuticals (−0.45%). We found a statistically significant positive effect on purchases of private insurance related to health care, which was attributable to NHI (an increase of 0.96 percentage points in household budget share). In addition, we discovered that the NHI program had a greater impact on households of a lower socioeconomic status compared with higher socioeconomic status households. The structure of OOP payments in the post-NHI period remained similar to that of the pre-NHI period in the full sample but varied slightly depending on the educational level of the head of the household.

Developmental manganese, lead, and barren cage exposure have adverse long-term neurocognitive, behavioral and monoamine effects in Sprague-Dawley rats

Developmental stress, including low socioeconomic status (SES), can induce dysregulation of the hypothalamic-pituitary-adrenal axis and result in long-term changes in stress reactivity. Children in lower SES households experience more stress and are more likely to be exposed to environmental neurotoxins such as lead (Pb) and manganese (Mn) than children in higher SES households. Co-exposure to stress, Pb, and Mn during early development may increase the risk of central nervous system dysfunction compared with unexposed children. To investigate the potential interaction of these factors, Sprague-Dawley rats were bred, and litters born in-house were culled on postnatal day (P)1 to 6 males and 6 females. One male and female within each litter were assigned to one of the following groups: 0 (vehicle), 10 mg/kg Pb, 100 mg/kg Mn, or 10 mg/kg Pb + 100 mg/kg Mn (PbMn), water gavage, and handled only from P4–28 with half the litters reared in cages with standard bedding (29 litters) and half with no bedding (Barren; 27 litters). Mn and PbMn groups had decreased anxiety, reduced acoustic startle, initial open-field hypoactivity, increased activity following (+)-methamphetamine, deficits in egocentric learning in the Cincinnati water maze (CWM), and deficits in latent inhibition conditioning. Pb increased anxiety and reduced open-field activity. Barren-reared rats had decreased anxiety, CWM deficits, increased startle, and initial open-field hyperactivity. Mn, PbMn, Pb Barren-reared groups had impaired Morris water maze performance. Pb altered neostriatal serotonin and norepinephrine, Mn increased hippocampal serotonin in males, Mn + Barren-rearing increased neostriatal serotonin, and Barren-rearing decreased neostriatal dopamine in males. At the doses used here, most effects were in the Mn and PbMn groups. Few interactions between Mn, Pb, and rearing stress were found, indicating that the interaction of these three variables is not as impactful as hypothesized.

Combining samples to offset nonresponse and respondent biases

What if probabilistic-based sampling does not result in a representative sample? How can researchers overcome low respondent engagement and hypothetical choices that are perceived as being socially desirable? These questions are relevant regardless of the way primary data collection is conducted.A statistically sound sampling strategy still depends on individuals volunteering their participation. Even with extrinsic rewards, there is no guarantee the respondent will contribute an honest effort. This research reports on the data collection for a study investigating the acceptance of electric vehicles (EV) in Australia. Complementing the Western Australian Electric Vehicle Trial, this research focuses on household preferences and attitudes towards EV. The data set represents the last stage of data collection with four surveys (initially delivered to trial participants and later aimed at the broader community).An initial sample showed high interest in EV and environmentally friendly technologies, but higher education levels and higher socioeconomic status households were overrepresented. To compensate for the bias, a second sample was collected from an online panel (PureProfile). Although neither sample is representative of the population, the results from the pooled data are deemed more appropriate for understanding drivers of EV uptake in Western Australia and informing policy making accordingly.