Minorities' Diminished Returns Research Articles

Black Americans' Diminished Health Returns of Professional Occupations: A Thirty-Year Follow-Up Study of Middle-Aged and Older Adults.

Occupational classes exert substantial effects on both subjective and objective health outcomes. However, it remains unclear whether the health impact of similar occupational classes varies across racial groups among middle-aged and older adults in the United States. Grounded in the theory of Minorities' Diminished Returns (MDRs), which posits that health benefits from resources such as employment are systematically weaker for racial minority populations, particularly Non-Latino Black individuals, this study tested Black-White disparities in the effects of similar occupational classes on health outcomes in middle-aged and older adults. Utilizing data from the Health and Retirement Study (HRS), we employed a 30-year longitudinal design with a nationally representative sample of middle-aged and older adults in the United States. Six occupational classes-operator, managerial, professional specialty, sales, clerical/admin, and service-served as the key predictor variables (independent variables), with race as the moderator. Various health outcomes, including self-rated health, chronic disease, body mass index (BMI), activities of daily living (ADL), and cognitive function, were measured longitudinally from wave 1 to wave 15 (from baseline to 30 years later). Statistical analyses, incorporating logistic regression models, were conducted to assess associations between occupational class and health outcomes overall and based on race. Our analysis included 7538 Non-Latino White or Non-Latino Black participants followed for up to 30 years. Initial findings revealed positive health effects of professional occupations on cognitive function and self-rated health over 30 years of follow-uWe also identified significant interactions between race and professional occupational class on all health outcomes, indicating notable racial differences in the effects of professional occupations on health outcomes across domains. The effects of professional occupational class were weaker for Non-Latino Black individuals than for Non-Latino White individuals. Consistent with the Minorities' Diminished Returns theory, our findings indicated less pronounced positive effects of professional occupations on a wide range of health outcomes for Non-Latino Black individuals compared to Non-Latino Whites. These disparities emphasize the critical need to address structural factors that contribute to the diminished returns of prestigious occupations for Non-Latino Black populations.

Diminished returns of educational attainment on life satisfaction among Black and Latino older adults transitioning into retirement

BackgroundThis paper investigates the intricate relationship between race/ethnicity, educational attainment, and life satisfaction among middle-aged and older adults in the United States. Guided by the theory of Minorities' Diminished Returns (MDRs), positing that returns on educational attainment are attenuated for minoritized populations, this study aims to explore racial/ethnic disparities in the impact of educational attainment on the life satisfaction of middle-aged and older adults. MethodsThis was a secondary analysis of existing data. Utilizing data from the Health and Retirement Study (HRS), we employed a longitudinal design with a nationally representative sample of middle-aged and older adults in the United States. Key variables of interest included educational attainment, race/ethnicity, and average life satisfaction from wave 9–15 (20–30 years later). Statistical analysis included regression models to assess the associations between educational attainment and life satisfaction overall and by race and ethnicity. ResultsOverall, 5274 participants entered our analysis and were followed for up to 30 years. Our initial findings revealed a positive association between educational attainment and life satisfaction. Subsequently, we identified significant interactions between race/ethnicity and educational attainment, indicating notable racial and ethnic differences in the impact of educational attainment on life satisfaction. The effects of baseline on future educational attainment and life satisfaction were weaker for Black and Latino than non-Latino White counterparts. ConclusionsIn accordance with the Minorities' Diminished Returns theory, Black and Latino middle-aged and older adults experience a less pronounced positive impact of educational attainment on life satisfaction compared to their Non-Latino and White counterparts. There are non-additive complex interplay between educational attainment and race and ethnicity on subjective well-being of middle-aged and older adults. The identified disparities in the returns of educational attainment underscore the critical need to recognize and address structural barriers that contribute to the diminished returns of educational attainment for Black and Latino populations.

Highly Educated Black Americans Report Higher than Expected Perceived Job Demands.

Educational attainment has well established and widely recognized the effects on employment conditions and job demands. However, the way in which educational attainment correlates with perceived job demands may be inconsistent across racial groups as suggested by Minorities' Diminished Returns (MDRs). The aim was to test the moderating effect of race on the association between educational attainment and perceived job demands, particularly for Black and White individuals. This study was a cross-sectional analysis of MIDUS Refresher 1, including 1,232 Black and White adults over the age of 25 in the United States. Education attainment was the independent variable and perceived job demands was the dependent variable covariates. Linear regression was used for multivariate models. We observed positive association between education and perceived job demands, however, statistical interaction between race and education suggested stronger positive associations for Black than White individuals. Being a highly educated Black professional in the United States equals high demand such increase stress is a risk factor of being a middle class black American. Innovated and bold market policies are required to solve this unfair dilemma.

High Systolic Blood Pressure of High-Income African American Children.

According to the Minorities' Diminished Returns (MDRs) theory, racism may reduce the health returns of family socioeconomic status (SEP) resources such as family income for racial minorities, particularly African Americans, compared to Whites. However, we are unaware of any previous studies on racial variation in the protective effects of family income on children's blood pressure. We conducted this study to compare the overall effects of family income on pre-adolescents' systolic and diastolic blood pressure, test racial variation in this effect, and investigate whether racial variation in this regard is due to racial differences in body mass index. In this cross-sectional study, we analyzed data from 4007 racially diverse US children 9-10years old. The independent variable was family income measured as a three-level categorical variable: less than $50K USD, 50-100K USD, and 100 + K USD. The primary outcomes were systolic and diastolic blood pressure measured up to three times at 1-min time intervals. Body mass index was the mediator. Mixed-effects regression models were used for data analysis to adjust for data nested to the centers, families, and individuals. Age, gender, parental education, family structure, and Latino ethnicity were covariates. In the pooled sample and in the absence of interaction terms in the model, family income did not show an inverse association with children's systolic (for 100 + K USD family income: β = - 0.71, p = 0.233 and for 50-100K USD family income: β = 0.01, p = 0.989) or diastolic blood pressure (for 100 + K USD family income: β = - 0.66, p = 0.172 and for 50-100K USD family income: β = 0.23, p = 0.600). However, race showed a significant interaction with family income on systolic blood pressure (for 50-100K USD × African American: β = 2.75, p = 0.034), suggesting higher systolic blood pressure of African American adolescents from high-income backgrounds. Racial variation in the protective effect of family income on systolic BP was no more significant (for 50-100K USD × African American: β = 2.14, p = 0.149) after we controlled for body mass index (BMI), which was higher for African American than White adolescents. The association between high family income and reduced systolic blood pressure in pre-adolescence might be weaker for African Americans compared to Whites, a difference that African American adolescents' higher body mass index can explain.

Race, Educational Attainment, and Sustained High Body Mass Index over 24 Years of Follow-up in Middle-Aged and Older Adults

BackgroundEducational attainment has been linked to reduced risk of health problems such as obesity, but research suggests that this effect may be weaker for non-Hispanic Black individuals compared to non-Hispanic White individuals, a pattern known as minorities’ diminished returns (MDRs).ObjectivesThis study is aimed at examining the differential association between educational attainment and sustained high body mass index (BMI) among non-Hispanic Black and non-Hispanic White middle-aged and older adults in the USA.MethodsUsing data from the Health and Retirement Study (HRS) spanning 1992–2016, we analyzed a national sample of 35,110 individuals, including 7766 non-Hispanic Black and 27,344 non-Hispanic White individuals. We used logistic regression models to examine the relationship between educational attainment, race, and sustained high BMI, while controlling for age, sex, and marital status at baseline.ResultsApproximately 30.6% of the sample (n = 10,727) had sustained high BMI, while 69.4% (n = 24,383) had sustained low BMI over the period of follow-up. Higher levels of educational attainment were associated with a lower risk of sustained high BMI. We also found, however, that the protective effects of education against sustained high BMI were weaker for non-Hispanic Blacks compared to non-Hispanic Whites.ConclusionOur findings suggest that the protective effects of educational attainment against sustained high BMI may be more robust for non-Hispanic Whites than for non-Hispanic Blacks. Further research should explore whether these results are found in other racial and ethnic minorities and whether potential life history experiences may contribute to these disparities.

Racism May Weaken the Brain-Behavior Association among African American Children: The Case of Amygdala Volume-Emotion Regulation Link

Introduction: The amygdala has a central core role in regulating emotions. However, less is known about the racial/ethnic variation in the relevance of amygdala volume for emotion regulation of US children. According to the Minorities’ Diminished Returns (MDRs) phenomenon, due to racism, segregation, and social stratification (rather than innate differences due to genetics), some of the individual-level individual social determinants, could lose some of their relevance for African American (in comparison to White) children. Purpose: Conceptualizing race as a social factor that reflects structural racism and discrimination and building on the MDRs framework, we explored racial variation in the magnitude of the association between amygdala volume and emotion regulation/impulsivity of US children. Methods: For this cross-sectional study, we used baseline data which included behavioral, social, and structural magnetic resonance imaging (MRI) data of 6030 US children ages 9-10. Data came from the Adolescent Brain Cognitive Development (ABCD) study. The primary outcomes were positive and negative urgency. These were measured using Urgency, Premeditation (lack of), Perseverance (lack of), Sensation Seeking, Positive Urgency, and Impulsive Behavior Scale (UPPS-SS) UPPS-SS. The independent variables were right and left amygdala volume. The covariates were age, sex, parental education, household income, parental marital status, neighborhood socioeconomic status, and ethnicity. Race was the moderator. Results: Children with larger amygdala volumes had lower positive and negative urgency. The correlations between amygdala volume and positive and negative urgency were modified by race. For White children, children had better emotion regulation when they had a large amygdala. For African American children, positive and negative urgency did not show an association with amygdala size. Conclusions: The results can be explained by the Minorities’ Diminished Returns (MDRs) hypothesis. In line with MDRs and as a result of structural and interpersonal inequalities, such as school segregation, the amygdala-emotion regulation seen for White children does not replicate for African American children. For White children, however, in the absence of higher-level social determinants, amygdala size correlates with emotion regulation. The brainbehavior link is weaker for African American children whose lives are less predictable and affected by experiences of racial discrimination. Unequal effects of equal resources across racial groups are due to racism and discrimination, not biological innate differences such as genetics.

Parental Education and Functional Connectivity between Nucleus Accumbens (NAcc) and Frontoparietal Network (FPN)

Introduction: While previous studies have indicated an association between socioeconomic status (SES) and children’s neuroimaging measures, weaker SES effects are shown for Black than White families. This is, in part, due to processes such as stratification, racism, marginalization, and othering of Black people in the US, which act as barriers to translating SES resources into health outcomes. Purpose: This study had two aims: First, to test the association between parental education and the nucleus accumbens (NAcc) resting-state functional connectivity (rsFC) with the frontoparietal network (FPN) in children; and second, to investigate racial heterogeneity in this association. Methods: This cross-sectional study used data from the Adolescent Brain Cognitive Development (ABCD) study. We analyzed the resting-state functional connectivity data of 7959 US pre-adolescents who were between 9 and 10 years old. The main outcome was the NAcc resting-state functional connectivity with FPN. Parental education was considered as an independent variable. Family structure, sex and age were the study covariates. Finally, race was regarded as the moderator. We used mixed-effects regression for data analysis with and without interaction terms between parental education and race. Results: Parental education was associated with higher NAcc resting-state functional connectivity with FPN. Race showed a statistically significant interaction with parental education, suggesting that the effects of parental education on NAcc rsFC with FPN was significantly weaker for Black pre-adolescents compared to White pre-adolescents. Conclusions: In line with Minorities’ Diminished Returns (MDRs), the association between parental education and pre-adolescents’ NAcc rsFC with FPN is weaker in Black pre-adolescents compared to their White counterparts. This finding is of interest because FPN’s rsFC with NAcc may have a role in cognitive flexibility and reward processing. The weaker links between SES indicators and children’s neuroimaging findings for Black than for White families may reflect the racialization of Blacks in the US. Social stratification, racism, and discrimination may minimize the returns of SES in Black communities.

Nucleus Accumbens Functional Connectivity with the Default Mode Network: Black Children’s Diminished Returns of Household Income

Introduction: Although research has established a link between socioeconomic status (SES) and neuroimaging measures, weaker SES effects are shown for Blacks than Whites. This is, in part, due to processes such as stratification, racism, mineralization, and othering of Black people in the US. Purpose: This study had two aims: First to test the association between household income and the nucleus accumbens (NAcc) resting-state functional connectivity with the Default Mode Network (DMN) in children, and second, to investigate racial heterogeneity in this association. Methods: This cross-sectional study used data from the Adolescent Brain Cognitive Development (ABCD) study. We analyzed the resting-state functional connectivity data using Magnetic Resonance Imaging (rsfMRI) of 7903 US pre-adolescents who were between ages 9 and 10 years old. The main outcome was the NAcc resting-state functional connectivity with DMN. The independent variable was household income. Age, sex, and family structure were the study covariates. Race was the moderator. Mixed-effects regression models were used for data analysis with and without interaction terms between household income and race. Results: Higher household income was associated with higher NAcc resting-state functional connectivity with DMN. Race showed a statistically significant interaction with household income suggesting that the NAcc resting-state functional connectivity with DMN was significantly weaker for Black compared to White pre-adolescents. Conclusions: In line with Minorities’ Diminished Returns (MDRs), the association between household income and pre-adolescents NAcc resting-state functional connectivity with DMN is weaker in Black than in White children. This result is of interest because DMN’s functional connectivity with NAcc may have a role in cognitive flexibility and reward processing. The weaker links between SES indicators and neuroimaging findings for Blacks than for Whites may reflect the racialization of Black people in the US. Social stratification, racism, and discrimination may minimize the returns of SES for Black families, who have been oppressed for centuries.

Diminished Effect of Smoking Intensity on African American and Latino Smokers’ Tobacco Risk Perception

Background: According to the Minorities’ Diminished Returns (MDRs), highly educated African American (AA) and Latino people remain at high risk of tobacco use. One hypothesis suggests that this high risk of tobacco use stems from AA and Latino people remaining unrealistically optimistic, resulting in the risks of tobacco use being discounted. Aims: To better understand the role of cognitive bias as a mechanism behind the high risk of smoking in highly educated minorities, we studied ethnic variation in the association between smoking intensity and perceiving oneself as a smoker among young American adult established current smokers. Methods: In this cross-sectional study, we used baseline data of 2,475 young adults (18-24 years) who were current established smokers. The data came from the Population Assessment of Tobacco and Health (PATH; 2013) study, a nationally representative survey in the US. The independent variable was smoking intensity. The dependent variable was not perceiving oneself as a smoker (probably due to optimistic cognitive bias and discounting the risk). Age, gender, and education were the covariates. Ethnicity was the moderator. Logistic regressions were used to analyze the data. Results: From the total number of 2,475 current smokers, 2106 (85.1%) perceived themselves-as a smoker, and 369 (14.9%) smokers perceived themselves as a non-smoker. A high level of smoking intensity was associated with lower odds of not perceiving oneself as a smoker. Two significant interactions were found between Latino and AA ethnicity and smoking intensity, suggesting that the effect of smoking intensity on perceiving oneself as a smoker is weaker in AAs than Whites and Latinos than non-Latinos. Conclusions:While tobacco use intensity is associated with a lower likelihood of optimistic cognitive bias and not perceiving oneself as a smoker, Latino and AA young adults who smoke many cigarettes a day are more likely than their non-Latino White counterparts with the same smoking risk not to perceive themself as a smoker. This finding suggests a psychological discounting of risk among AA and Latino smokers. Such cognitive bias may help them avoid cognitive dissonance and reduce their own perceived risk of cancer and other fatal conditions from smoking. A cognitive bias may increase the smoking burden of AA and Latino young adults through discounting smoking risk.

Social Determinants of Cigarette Smoking among American Women during Pregnancy

Educational attainment is among the most substantial protective factors against cigarette smoking, including during pregnancy. Although Minorities’ Diminished Returns (MDRs) of educational attainment, defined as weaker protective effect of education for racial and ethnic minority groups compared to Non-Hispanic Whites, has been demonstrated in previous studies; such MDRs are not tested for cigarette smoking during pregnancy. To better understand the relevance of MDRs to tobacco use during pregnancy, this study had three aims: firstly, to investigate the association between educational attainment and cigarette smoking in pregnant women; secondly, to compare racial and ethnic groups for the association between educational attainment and cigarette smoking; and thirdly, to explore the mediating effect of poverty status on such MDRs, among American adults during pregnancy. This cross-sectional study explored a nationally representative sample of pregnant American women (n = 338), which was taken from the Population Assessment of Tobacco and Health (PATH; 2013). Current smoking was the outcome. Educational attainment was the independent variable. Region and age were the covariates. Poverty status was the mediator. Race and ethnicity were the effect modifiers. Overall, a higher level of educational attainment (OR = 0.54, p < 0.05) was associated with lower odds of current smoking among pregnant women. Race (OR = 2.04, p < 0.05) and ethnicity (OR = 2.12, p < 0.05) both showed significant interactions with educational attainment on smoking, suggesting that the protective effect of educational attainment against smoking during pregnancy is smaller for Blacks and Hispanics than Non-Hispanic Whites. Poverty status fully mediated the above interactions. In the United States, highly educated pregnant Black and Hispanic women remain at higher risk of smoking cigarettes, possibly because they are more likely to live in poverty, compared to their White counterparts. The results suggest the role that labor market discrimination has in explaining lower returns of educational attainment in terms of less cigarette smoking by racial and ethnic minority pregnant women.

Parental Education and Children’s Sleep Problems: Minorities’ Diminished Returns

Background and aims: While increased parental education reduces children’s sleep problems, less is known about racial variation in such protection. According to Minorities’ Diminished Returns (MDRs) theory, economic resources such as parental education show weaker health effects for minority groups such as Blacks and Latinos than non-Latino Whites, which is due to racism and social stratification. In this study, we investigated the association between parental education and children’s sleep problems, as a proxy of sleep problems, by race. Methods: This cross-sectional study included 11718 American children aged 9-10. All participants were recruited to the Adolescent Brain Cognitive Development (ABCD) study. The independent variable was parental education, a five-level nominal variable. The dependent variable – sleep problems, was a continuous variable. Race/ethnicity was the effect modifier. Age, sex, and marital status were the covariates. Mixed-effects regression models were used for data analysis. Results: Parental education was associated with children’s sleep problems. However, there was a weaker inverse association seen in non-Latino Black and Latino families compared to non-Latino White families. This was documented by a significant statistical interaction between race and ethnicity and parental education on children’s sleep problems. Conclusion: Diminished protective effect of parental education on children’s sleep problems for non-Latino Black and Latino families compared to non-Latino White families is similar to the MDRs in other domains. Worse than expected sleep may contribute to higher-than-expected health risks of middle-class Black and Latino children.

Resting-State Functional Connectivity between Putamen and Salience Network and Childhood Body Mass Index.

Introduction: Although the putamen has a significant role in reward-seeking and motivated behaviors, including eating and food-seeking, minorities’ diminished returns (MDRs) suggest that individual-level risk and protective factors have weaker effects for Non-Hispanic Black than Non-Hispanic White individuals. However, limited research is available on the relevance of MDRs in terms of the role of putamen functional connectivity on body mass index (BMI). Purpose: Building on the MDRs framework and conceptualizing race and socioeconomic status (SES) indicators as social constructs, we explored racial and SES differences in the associations between putamen functional connectivity to the salience network and children’s BMI. Methods: For this cross-sectional study, we used functional magnetic resonance imaging (fMRI) data of 6473 9–10-year-old Non-Hispanic Black and Non-Hispanic White children from the Adolescent Brain Cognitive Development (ABCD) study. The primary independent variable was putamen functional connectivity to the salience network, measured by fMRI. The primary outcome was the children’s BMI. Age, sex, neighborhood income, and family structure were the covariates. Race, family structure, parental education, and household income were potential moderators. For data analysis, we used mixed-effect models in the overall sample and by race. Results: Higher right putamen functional connectivity to the salience network was associated with higher BMI in Non-Hispanic White children. The same association was missing for Non-Hispanic Black children. While there was no overall association in the pooled sample, a significant interaction was found, suggesting that the association between right putamen functional connectivity to the salience network and children’s BMI was modified by race. Compared to Non-Hispanic White children, Non-Hispanic Black children showed a weaker association between right putamen functional connectivity to the salience network and BMI. While parental education and household income did not moderate our association of interest, marital status altered the associations between putamen functional connectivity to the salience network and children’s BMI. These patterns were observed for right but not left putamen. Other/Mixed Race children also showed a pattern similar to Non-Hispanic Black children. Conclusions: The association between right putamen functional connectivity to the salience network and children’s BMI may depend on race and marital status but not parental education and household income. While right putamen functional connectivity to the salience network is associated with Non-Hispanic White children’s BMI, Non-Hispanic Black children’ BMI remains high regardless of their putamen functional connectivity to the salience network. This finding is in line with MDRs, which attributes diminished effects of individual-risk and protective factors for Non-Hispanic Black children to racism, stratification, and segregation.

Parental Education or Household Income? Which Socioeconomic Status Indicator Can Better Reduce Body Mass Index Disparities among Latino Children?

We compared the effects of parental education and household income on children's body mass index (BMI) in Hispanic White (HW) and non-Hispanic White (NHW) families. In this cross-sectional study, we borrowed data from the Adolescent Brain Cognitive Development (ABCD) study and analyzed data of 5100 children between the ages of 9 and 10. The independent variables were parental education and household income. The primary outcome was BMI value. Ethnicity was the moderating variable. Confounders were age, sex, and family structure. Three mixed-effects regression models were used for data analysis. Overall, higher parental education and household income were associated with lower BMI levels in children. While an interaction was found between ethnicity and parental education, no interaction was noted between ethnicity and household income regarding BMI. The interaction indicated weaker protective effects of high parental education on BMI in HW children than NHW children. Household income showed similar protective effects on children's BMI in HW and NHW families. Parental education but not household income loses some of its protective effects on childhood BMI among HW families compared to NHW families. Distal social determinants of health may be more vulnerable to the MDRs (minorities' diminished returns) than proximal ones. As a result, closing the income gap may be a good strategy towards closing the childhood BMI gap between highly educated HW and NHW families. Policies that raise the minimum wage and those that help HW families save money (e.g., earned income tax policies) maybe more promising strategies to eliminate the ethnic gap in BMI than increasing the education level of ethnic minority families.

Are Teachers Biased against Black Children? A Study of Race, Amygdala Volume, and Problem Behaviors

Introduction: While the amygdala has a core role in behaviors, less is known about racial variation in the association between amygdala volume and teachers’ behavioral rating of children. According to the Minorities’ Diminished Returns (MDRs) phenomenon, the effects of individual-level risk and protective factors tend to be weaker for Black than White children due to structural factors such as social stratification and racism. Purpose: Built on the MDRs framework and conceptualizing race as a social rather than a biological factor, this study explored racial variation in the magnitude of the effects of amygdala volume on teachers’ behavioral ratings of children. Methods: For this cross-sectional study, we used baseline socioeconomic data and structural magnetic resonance imaging (sMRI) data of 4305 American children ages 9-10 who had participated in the Adolescent Brain Cognitive Development (ABCD) study. The primary outcome was the teachers’ behavioral rating of the child. The independent variable was amygdala volume. Age, sex, parental education, parental marital status, and ethnicity were the covariates. Race was the moderator. We used mixed-effect models for data analysis to adjust for the participants’ nested nature within families and study sites. Results: Teachers rated children with larger amygdala volumes as having lower behavioral problems. The concordance between size of amygdala volume and teachers’ behavioral rating of the child was modified by race. For while children, teachers reported the children to have lower behavioral problems when they had a large amygdala. For Black children, teachers reported high behavioral problems across all amygdala sizes. Conclusions: The results can be explained in two ways. The first explanation is minorities’ diminished returns hypothesis (MDRs). In line with MDRs, due to structural inequalities and school segregation, a large amygdala would result in a more favorable behavioral rating of the White children than Black children, as we expect an unequal effect of equal resources across racial groups in the presence of racism. The second explanation is systemic bias of teachers against Black children: meaning that due to their anti-Black bias, teachers report high behavioral problems in Black children, across all amygdala sizes (behavioral profiles). That means, race may trigger some cues and biases in the teachers, so they do not pay attention to the details of the behavioral profile of the Black child. For White children, however, in the absence of such racial bias, teachers behavioral rating of a child reflects the child’s amygdala size.

Parental Education, Household Income, and Cortical Surface Area among 9-10 Years Old Children: Minorities' Diminished Returns.

Introduction: Although the effects of parental education and household income on children’s brain development are well established, less is known about possible variation in these effects across diverse racial and ethnic groups. According to the Minorities’ Diminished Returns (MDRs) phenomenon, due to structural racism, social stratification, and residential segregation, parental educational attainment and household income show weaker effects for non-White than White children. Purpose: Built on the MDRs framework and conceptualizing race as a social rather than a biological factor, this study explored racial and ethnic variation in the magnitude of the effects of parental education and household income on children’s whole-brain cortical surface area. Methods: For this cross-sectional study, we used baseline socioeconomic and structural magnetic resonance imaging (sMRI) data of the Adolescent Brain Cognitive Development (ABCD) study. Our analytical sample was 10,262 American children between ages 9 and 10. The independent variables were parental education and household income. The primary outcome was the children’s whole-brain cortical surface area. Age, sex, and family marital status were covariates. Race and ethnicity were the moderators. We used mixed-effects regression models for data analysis as participants were nested within families and study sites. Results: High parental education and household income were associated with larger children’s whole-brain cortical surface area. The effects of high parental education and high household income on children’s whole-brain cortical surface area were modified by race. Compared to White children, Black children showed a diminished return of high parental education on the whole-brain cortical surface area when compared to White children. Asian American children showed weaker effects of household income on the whole-brain cortical surface area when compared to White children. We could not find differential associations between parental education and household income with the whole-brain cortical surface area, when compared to White children, for non-Hispanic and Hispanic children. Conclusions: The effects of parental educational attainment and household income on children’s whole-brain cortical surface area are weaker in non-White than White families. Although parental education and income contribute to children’s brain development, these effects are unequal across racial groups.

Parental Education, Household Income, Race, and Children's Working Memory: Complexity of the Effects.

Background. Considerable research has linked social determinants of health (SDoHs) such as race, parental education, and household income to school performance, and these effects may be in part due to working memory. However, a growing literature shows that these effects may be complex: while the effects of parental education may be diminished for Blacks than Whites, household income may explain such effects. Purpose. Considering race as sociological rather than a biological construct (race as a proxy of racism) and built on Minorities’ Diminished Returns (MDRs), this study explored complexities of the effects of SDoHs on children’s working memory. Methods. We borrowed data from the Adolescent Brain Cognitive Development (ABCD) study. The total sample was 10,418, 9- and 10-year-old children. The independent variables were race, parental education, and household income. The primary outcome was working memory measured by the NIH Toolbox Card Sorting Test. Age, sex, ethnicity, and parental marital status were the covariates. To analyze the data, we used mixed-effect regression models. Results. High parental education and household income were associated with higher and Black race was associated with lower working memory. The association between high parental education but not household income was less pronounced for Black than White children. This differential effect of parental education on working memory was explained by household income. Conclusions. For American children, parental education generates unequal working memory, depending on race. This means parental education loses some of its expected effects for Black families. It also suggests that while White children with highly educated parents have the highest working memory, Black children report lower working memory, regardless of their parental education. This inequality is mainly because of differential income in highly educated White and Black families. This finding has significant public policy and economic implications and suggests we need to do far more than equalizing education to eliminate racial inequalities in children’s cognitive outcomes. While there is a need for multilevel policies that reduce the effect of racism and social stratification for middle-class Black families, equalizing income may have more returns than equalizing education.

Household Income and Children's Depressive Symptoms: Immigrants' Diminished Returns.

Relative to socially privileged groups, socially marginalized people experience weaker health effects of household income and other economic resources, a pattern known as Minorities' Diminished Returns (MDRs). These MDRs are frequently seen in racial and ethnic minorities, but less is known about the relevance of such MDRs in immigrant families. To investigate the MDRs of household income on children's depression as a function of immigration, we compared non-immigrant and immigrant children for the effect of household income on children's depressive symptoms. This cross-sectional study was conducted across multiple cities in the United States. Baseline data from the Adolescent Brain Cognitive Development (ABCD) study collected in 2018 was used. A total of 6,412 children between the ages of 9-10-year-old were included. The predictor variable was household income. The primary outcome was children's depression measured by the Child Behavior Checklist (CBCL). Race, ethnicity, age, sex, parental marital status, parental employment, and financial difficulties were the covariates. Immigration status was the effect modifier. Overall, high household income was associated with lower children's depressive symptoms. Immigration status showed a statistically significant interaction with household income on children's depression. This interaction term suggested that high household income has a smaller protective effect against depression for immigrant children than non-immigrant children. The protective effect of household income against children's depression is diminished for immigrant than non-immigrant children.

American Children's Screen Time: Diminished Returns of Household Income in Black Families.

While increased household income is associated with overall decreased screen time for children, less is known about the effect of racial variation on this association. According to Minorities' Diminished Returns (MDRs) theory, family income and other economic resources show weaker association with children's developmental, behavioral, and health outcomes for racialized groups such as black families, due to the effect of racism and social stratification. In this study, we investigated the association, by race, between family income and children's screen time, as a proxy of screen time. This longitudinal study followed 15,022 American children aged 9-11 over a 1-year period. The data came from the baseline of the Adolescent Brain Cognitive Development (ABCD) study. The independent variable was family income, and it was categorized as a three-level nominal variable. The dependent variable, screen time, was a continuous variable. Ethnicity, gender, parental education, and marital status were the covariates. The results showed that family income was inversely associated with children's screen time. However, there was a weaker inverse association seen in black families when compared with white families. This was documented by a significant statistical interaction between race and family income on children's screen time. Diminished association between family income and children's screen time for black families, compared with white families, is similar to MDRs and reflects a health risk to high-income black children. In a society where race and skin color determine opportunities and treatment by society, children from middle class black families remain at risk across multiple domains. We should not assume that income similarly promotes the health of all racial and ethnic groups. Addressing health and behavioral inequalities requires interventions that go beyond equalizing socioeconomic resources for black families. Marginalization, racism, and poverty interfere with the normal family income-related development of American children.

Mental Rotation in American Children: Diminished Returns of Parental Education in Black Families.

Background: While parental education and family socioeconomic status (SES) are associated with an increase in children’s cognitive functioning, and less is known about racial variation in these effects. Minorities’ Diminished Returns (MDRs) suggest that, under racism and social stratification, family SES and particularly parental education show weaker effects on children’s tangible outcomes for marginalized, racialized, and minoritized families, particularly Blacks, compared to Whites. Aim: We conducted this study to compare the effect of parental education on children’s mental rotation abilities, as an important aspect of cognitive function, by race. Methods: This cross-sectional study included 11,135 9–10-year-old American children. Data came from baseline of the Adolescent Brain Cognitive Development (ABCD) study. The independent variable was parental education. The dependent variable, mental rotation, was measured by the Little Man Task. Ethnicity, gender, age, marital status, and household income were the covariates. Results: Parental education was positively associated with mental rotation. However, parental education showed a weaker association with mental rotation in Black than in White families. This was documented by a significant interaction between race and parental education on children’s efficiency score. Conclusion: Parental education shows a weaker correlation with mental rotation of Black rather than White children, which is probably because of racism, social stratification, and discrimination. This finding is in line with the MDRs phenomenon and suggests that marginalization and racism may interfere with the influences of parental assets and resources and Black American children’s development.

Parental Education and Nucleus Accumbens Response to Reward Anticipation: Minorities' Diminished Returns.

Considerable research has documented the effects of race and socioeconomic status (SES) on reward-seeking behaviors; however, less is known about the multiplicative effects of race and family SES on brain response to reward anticipation. Marginalization-related Diminished Returns (MDRs) suggest that family SES would show weaker effects on brain development of children in non-White families than in White families. To test race by SES variation in Nucleus Accumbens (NAcc) response to reward anticipation (NAcc-RA) among American children. For this cross-sectional analysis, data came from the Adolescent Brain Cognitive Development (ABCD) study which included 6,419, 9-10 year old children. The independent variable was parental education. The moderator was race. The primary outcome was the right NAcc-RA. Age, sex, ethnicity, household income, and family structure were the covariates. We used mixed effects regression models that adjusted for the nested nature of the ABCD data. While high parental education was associated with a higher amount of right NAcc-RA, this effect was stronger for White than non-White children. This finding was evident in the observed interactions between race and parental education on the right NAcc-RA. For American children, NAcc-RA is not shaped by race or family SES, but by their intersection. As a result of the interaction between race and SES (diminished return of SES for non-Whites), middle-class racial minority children may remain susceptible to high-risk behaviors. Disparities in high-risk behaviors in children should not be reduced to economic disparities. Structural inequalities may reduce the return of SES resources for non-White families.