Entrainment to a real time fractal visual stimulus modulates fractal gait dynamics

Fractal patterns characterize healthy biological systems and are considered to reflect the ability of the system to adapt to varying environmental conditions. Previous research has shown that fractal patterns in gait are altered following natural aging or disease, and this has potential negative consequences for gait adaptability that can lead to increased risk of injury. However, the flexibility of a healthy neurological system to exhibit different fractal patterns in gait has yet to be explored, and this is a necessary step toward understanding human locomotor control. Fifteen participants walked for 15 min on a treadmill, either in the absence of a visual stimulus or while they attempted to couple the timing of their gait with a visual metronome that exhibited a persistent fractal pattern (contained long-range correlations) or a random pattern (contained no long-range correlations). The stride-to-stride intervals of the participants were recorded via analog foot pressure switches and submitted to detrended fluctuation analysis (DFA) to determine if the fractal patterns during the visual metronome conditions differed from the baseline (no metronome) condition. DFA α in the baseline condition was 0.77 ± 0.09. The fractal patterns in the stride-to-stride intervals were significantly altered when walking to the fractal metronome (DFA α = 0.87 ± 0.06) and to the random metronome (DFA α = 0.61 ± 0.10) (both p < .05 when compared to the baseline condition), indicating that a global change in gait dynamics was observed. A variety of strategies were identified at the local level with a cross-correlation analysis, indicating that local behavior did not account for the consistent global changes. Collectively, the results show that a gait dynamics can be shifted in a prescribed manner using a visual stimulus and the shift appears to be a global phenomenon.     

Making space for India in post-apartheid South Africa: Narrating diasporic subjectivities through classical song and dance

Background/purposeDiasporic associations and hometown groups fuel transnational exchanges and circulations. Their role has mostly been understood in terms of broader calculative agendas related to ethnic and national cultural politics. In South Africa, classical Indian singers, dancers and instrumentalists are an important part of these transnational landscapes. This paper focuses on the individual actors giving shape to these flows, and explores how a range of subjectivities is entangled with the materialities and forces present in classical performance spaces.Methods and resultsDrawing on fieldwork in Durban, South Africa, it explores how, and why organising actors assemble the matter of classical performance spaces. The paper also explores interconnections to Bollywood as another emergent diasporic site both in tension and accord with classical Indian performances.ConclusionDrawing from a feminist social practice approach, this paper argues that diaspora associational life is assembled through agents negotiating different gaps and discrepancies arising from the material and affective inhabitation of diasporic worlds.     

HIV infection in the South African construction industry

South Africa has one of the highest HIV prevalences in the world, and compared with other sectors of the national economy, the construction industry is disproportionately adversely affected. Using data collected nationally from more than 57,000 construction workers, HIV infection among South African construction workers was estimated, together with an assessment of the association between worker HIV serostatus and worker characteristics of gender, age, nature of employment, occupation, and HIV testing history. The HIV infection of construction workers was estimated to be lower than that found in a smaller 2008 sample. All worker characteristics are significantly associated with HIV serostatus. In terms of most at-risk categories: females are more at risk of HIV infection than males; workers in the 30–49 year old age group are more at risk than other age groups; workers employed on a less permanent basis are more at risk; as are workers not having recently tested for HIV. Among occupations in the construction industry, general workers, artisans, and operator/drivers are those most at risk. Besides yielding more up-to-date estimated infection statistics, this research also identifies vulnerable sub-groups as valuable pointers for more targeted workplace interventions by construction firms.     

Concurrent tobacco use and risky drinking in South Africa: Results from the South African National Health and Nutrition Examination Survey

The aim of this study was to examine socio-demographic and psychosocial correlates of concurrent tobacco use and risky drinking. We analysed data from the cross-sectional South African National Health and Nutrition Examination Survey (SANHANES-1) 2011–2012. The sample included 14 764 adolescents and adults aged 15 years and older. They responded to questions on tobacco and alcohol use, psychosocial, and socio-demographic indicators. Results indicate that 9.6% (16.8% among men and 3.5% among women) of South Africans were involved in concurrent tobacco use and risky drinking, 18.2% in current tobacco use only, and 20.3% in risky drinking only. In covariate adjusted analysis, being 25 to 64 years, being male, belonging to the coloured population group, residing in urban areas, having experienced three or more traumatic events, and poor self-rated health were associated with concurrent tobacco use and risky drinking. Findings suggest socio-demographic and health factors are important for public health interventions in addressing concurrent tobacco and alcohol use in South Africa.     

Demographic correlates of normative beliefs about aggression among adolescents from low income communities in South Africa

The present study investigated the association of age, gender, and family size with normative beliefs about aggression among South African adolescents from low-income areas. Adolescents (n = 229; mean age = 16 years; female = 61%) completed the Normative Beliefs about Aggression Scale. Step-wise regression analyses were conducted with age, gender, and family size as predictors of normative beliefs about aggression. Boys demonstrated greater endorsement of physical, non-physical, and relational aggression; as compared to girls. Living in an extended family was associated with less approval of aggression. Aggression reduction interventions with children from disadvantaged areas need to consider the role of gender and family-related factors.     

Battle Christologies as a risky act of resistance à la Jesus: A South African perspective

This study depicts African “battle Christologies” as a risky act of resistance à la Jesus, that is, concomitant of Jesus’ own life in terms of their modus operandi. Their christic features are discussed in contradistinction to the mainstream Western christological tradition. Only by probing the dynamics of power and difference inherent in the cultural appropriations of Jesus can their specific performative consequences be accurately captured. In light of the study, some methodological considerations are being offered with regard to the way in which prophetic theology should be done in post‐apartheid South Africa and the Global South in general.     

A force of change: Chris Peterson and the US Army’s Global Assessment Tool

The US Army launched the Global Assessment Tool (GAT) – a 105-item psychometric instrument taken by approximately one million soldiers annually – in October, 2009 in support of a population-wide resilience development initiative known as the Comprehensive Soldier and Family Fitness (CSF2) program. The lead developer of the GAT was Chris Peterson, and his work on this project – along with that of Nansook Park and Colonel Carl Castro – will likely leave an important and indelible mark on not only the Army, but also the field of military psychology. In this paper, we provide more detail on the history and components of the GAT. In addition, we demonstrate the practical utility of the GAT by showing that high-performing soldiers (soldiers who attained Ranger status) have relatively high GAT scores, and that soldiers with behavioral problems generally evidence low GAT scores. We conclude by discussing future directions of GAT methodology and usage in support of research.     

Enhancing Critical Consciousness Through a Cross‐Cultural Immersion Experience in South Africa

Using phenomenological approaches, the author explored the meanings and essences of a cross‐cultural immersion experience in South Africa among counseling master's‐level students. Five core themes—the meaning of being American, sociopolitical awareness, engagement with South Africans and their communities, appreciation of life, and commitment to change—characterized the development of critical consciousness (Freire, 1973 , 2000 ). Findings support positive influences of cross‐cultural immersion as an experiential pedagogical method for multicultural development. Usando enfoques fenomenológicos, se exploraron los significados y esencias de una experiencia de inmersión transcultural en Sudáfrica entre estudiantes de nivel máster en consejería. Cinco temas centrales (el significado de ser estadounidense, la conciencia sociopolítica, la interacción con individuos sudafricanos y sus comunidades, la valoración de la vida y el compromiso con el cambio) caracterizaron el desarrollo de la conciencia crítica (Freire, 1973 , 2000 ). Los hallazgos confirman influencias positivas de la inmersión transcultural como un método pedagógico basado en la experiencia para el desarrollo multicultural.     

DSM-defined anxiety disorders symptoms in South African youths: Their assessment and relationship with perceived parental rearing behaviors

This study investigated DSM-defined anxiety symptoms in South African youths. Children and adolescents (N = 701) from various cultural groups completed the SCARED and a questionnaire measuring perceived parental rearing behaviors. Results indicated that the psychometric properties of the SCARED were satisfactory in the total sample of South African youths, and acceptable in colored and black children and adolescents. Further, colored and black youths displayed higher SCARED scores than white youths, and there were also differences in the perceived parental rearing behaviors of the cultural groups. White youths generally rated their parents' rearing behaviors as less anxious, overprotective, and rejective, but more emotionally warm than colored and black youths. Finally, positive correlations were found between anxious rearing, overprotection, and rejection and anxiety symptoms. The clinical and research implications of these findings are briefly discussed.     

Expanding the study of U.S. religion: Reflections on the state of a subfield

The study of U.S. religion, which dates from the 19th century, expanded its sources, methods, and scope during the last quarter of the 20th century, as specialists offered more inclusive historical narratives. That methodological expansion never went far enough, however, and the impulse toward narrative inclusiveness has been restrained in recent years. The subfield, I argue, now faces a number of challenges that also confront other specializations in the study of religion—contraction, overspecialization, fragmentation, and parochialism. After a focused overview of the subfield’s history, I discuss those challenges. Proposing a tentative response, I suggest that specialists celebrate methodological diversity and theoretical sophistication, encourage comparative and translocative studies, and increase collaboration across disciplinary boundaries and national borders. Finally, I suggest that we expand the subfield’s temporal span and geographical scope and reframe the study of U.S. religion in terms of the Atlantic World, the Pacific World, and the Western Hemisphere.