OBJECTIVES The purpose here is to identify those processes that account for the more active and supportive kinship networks among Black oldest old than found among their White age peers. METHODS Focused interviews were conducted with 122 Blacks 85 years and older. Both open-ended and semistructured questions were asked in order to determine how Blacks defined family and kinship membership, th...

C. M. Steele and J. Aronson (1995) showed that making race salient when taking a difficult test affected the performance of high-ability African American students, a phenomenon they termed stereotype threat. The authors document that this research is widely misinterpreted in both popular and scholarly publications as showing that eliminating stereotype threat eliminates the African American-Whi...

A survey has been carried out on the composition of final molasses from South African sugar factories. Regional and seasonal trends in various parameters have been noted, and the degree of exhaustion of the molasses has been commented upon. Included in the survey are data on the nonsucrose constituents of molasses, and the inorganic ash components. Comparisons are made with a similar survey con...

PURPOSE This investigation examined the performance of 50 African American children on a reading comprehension test. METHOD Longitudinal data were compared for two groups of students who were preschoolers or kindergartners at Time 1 and elementary-grade students at Time 2. Outcomes were examined for positive predictive relationships based on their oral language and cognitive skills as prescho...

Two species of desert ants - the North African Cataglyphis fortis and the central Australian Melophorus bagoti - differ markedly in the visual complexity of their natural habitats: featureless salt pans and cluttered, steppe-like terrain, respectively. Here we ask whether the two species differ in their navigational repertoires, in particular, whether in homing they place different emphasis on ...

A Belgian traveller was diagnosed with human African trypanosomiasis (HAT) due to Trypanosoma brucei rhodesiense nine days after visiting the Masai Mara area in Kenya. He presented with an inoculation chancre and was treated with suramin within four days of fever onset. Two weeks earlier, HAT was also reported in a German traveller who had visited the Masai Mara area. Because no cases have occu...

Although of crucial importance for invasion biology and impact assessments of climate change, it remains widely unknown how species cope with and adapt to environmental conditions beyond their currently realized climatic niches (i.e., those climatic conditions existing populations are exposed to). The African clawed frog Xenopus laevis, native to southern Africa, has established numerous invasi...

Understanding the influence of non-susceptible hosts on vector-borne disease transmission is an important epidemiological problem. However, investigation of its impact can be complicated by uncertainty in the location of the hosts. Estimating the risk of transmission of African horse sickness (AHS) in Great Britain (GB), a virus transmitted by Culicoides biting midges, provides an insightful ex...