Examining the Influence of Measures of Adiposity on Cognitive Function in Middle Age and Older African Americans.

The objectives of the study were to examine whether measures of total obesity (body mass index [BMI]) and central obesity (waist circumference [WC] and waist-to-hip ratio [WHR]) are associated with cognitive function in African Americans, and whether sex moderates these associations. A sample of 194 African Americans, with a mean age of 58.97 years, completed a battery of cognitive tests and a self-reported health questionnaire. Height, weight, waist and hip circumference, and blood pressure were assessed. Linear regression analyses were run. Results suggested lower performance on measures of verbal fluency and complex attention/cognitive flexibility was accounted for by higher levels of central adiposity. Among men, higher WHR was more strongly related to complex attention/cognitive flexibility performance, but for women, WC was a salient predictor. Higher BMI was associated with poorer verbal memory performance among men, but poorer nonverbal memory performance among women. Findings suggest a need for healthy lifestyle interventions for African Americans to maintain healthy weight and cognitive function.

Understanding African American college students' H1N1 vaccination decisions.

OBJECTIVE: In this study, we examined the effects of cognitive appraisals and individual differences in discomfort with uncertainty, as measured by a short form of Webster and Kruglanski's (1994) Need for Closure (NFC) scale, on African American college students' self-reported H1N1 vaccination decisions during the 2009-2010 H1N1 pandemic. METHOD: Howard University undergraduates, who self-identified as Black or African American and met U.S. Department of Health and Human Services, Centers for Disease Control and Prevention (CDC) H1N1 high-priority group criteria, completed computer-administered surveys that included (a) questions about H1N1 vaccination status; self-efficacy; perceived costs, benefits, and efficaciousness of the H1N1 vaccine; and potential barriers to vaccination, including flu-shot frequency; (b) demographic measures; and (c) a short form of Kruglanski's NFC scale (Orehek et al., 2010). RESULTS: A sequential multinomial logistic regression revealed (a) a significant effect of NFC on vaccination status such that higher NFC was associated with lower odds of being vaccinated or intending to be vaccinated, after controlling for demographic variables, comfort with flu vaccinations more generally, and several other potential vaccination barriers, χ(2)(2, 217) = 10.08, p = .006; and (b) vaccination status was best accounted for by a model that included perceptions of the vaccine's costs, benefits, and efficaciousness, and participants' self-efficacy for being vaccinated, χ(2)(6, 217) = 57.24, p < .001. CONCLUSION: Our data suggest the importance of cognitive appraisals and traits (i.e., comfort with uncertainty) in the process individuals use to make potentially life-saving vaccination decisions.

Dispositional depression and hostility are associated with inflammatory markers of cardiovascular disease in African Americans.

Prior research has demonstrated that state depressive symptoms and hostility can modulate inflammatory immune responses and directly contribute to cardiovascular disease (CVD) onset and development. Previous studies have not considered the contribution of dispositional depressive symptoms to the inflammatory process. They have also largely excluded African Americans, despite their disproportionate risk for CVD. The first aim of the study was to examine the impact of state and dispositional depression and hostility on CVD-associated inflammatory biomarkers interleukin-6 (IL-6) and C-reactive protein (CRP) in an African American sample. The second aim was to examine synergistic influences of hostility and state and dispositional depression on IL-6 and CRP. The final aim was to examine whether the relations between state and dispositional depression, hostility, IL-6, and CRP varied as a function of gender and education. Anthropometric measures, blood serum samples, and psychosocial data were collected from 198 African Americans from the Washington, DC metropolitan area. Hierarchical and stepwise regression analyses indicated that (1) increased levels of hostility were associated with increased levels of CRP; (2) hostility and IL-6 were more strongly associated among participants with lower educational attainment; and (3) dispositional depression and CRP were more strongly associated among participants with greater hostility and lower educational attainment. Findings suggest that enduring personality dispositions, such as dispositional depression and hostility, are critical to a thorough assessment of cardiovascular profiles in African Americans. Future studies should investigate causal pathways that link depressive and hostile personality styles to inflammatory activity for African American men and women.

Group differences in fairness perceptions and decision making in voting rights cases.

Participants recruited from one Historically Black University (HBU) and two predominantly White higher-education institutions evaluated and decided simulated voting rights case summaries in which the plaintiff was either a racially-defined (African American) or a nonracially-defined (farmers) minority group. Contrary to social identity and social justice findings of an in-group bias, the present study showed greater support at all institutions for the voting rights of the African Americans than for the rural farmers, and the greatest support for both minority groups was found at the HBU. Perceived evidence strength was a better predictor of decisions than perceived unfairness, and both of these predictor variables completely mediated the effects of institution-type and involvement of a racially-defined group on decisions.