Visual function,performance, and processing of basketball players vs. sedentary individuals

BackgroundAthletes tend to have better visuo-motor performance than do sedentary individuals. However, several basic visual-function and perceptual parameters remain unexplored to date. In this study, we investigated whether differences exist in visual function, performance, and processing between basketball players and individuals without a sport-involvement background.MethodsA total of 33 healthy men with no visual impairment or pathology were divided into 2 groups, depending on the involvement in sport (semi-professional basketball players and sedentary individuals). We tested their baseline heart-rate variability in the resting position apart from subjective questionnaires to determine their physical fitness level, and we checked their visual function, performance, and processing through an extended battery of optometric tests.ResultsThe 2 groups differed in resting heart-rate variability parameters (p < 0.001), confirming their dissimilarities in regular time practising sports per week. The basketball players showed a closer breakpoint and recovery nearpoint of convergence, a higher fusional-vergence rate, better discriminability halos, and better eye–hand coordination (all p values < 0.05).ConclusionThese results show evidence that athletes, basketball players in this case, exhibit better performance in several visual abilities in comparison to a group of individuals without sporting backgrounds, suggesting an improvement due to the systematic involvement of those skills during basketball practice.     

Sexual dimorphism in bone–muscle relationship in young adults

The purpose of this study was to analyse associations between lean soft tissue (LST), a surrogate of skeletal muscle mass and key fracture-related geometric characteristics of the proximal femur. Moreover, we examined the role that muscle played on the proximal femur geometry in response to physical activity (PA). Participants were 83 young adults. Leg LST (exposure) was assessed by dual energy X-ray absorptiometry (DXA). Proximal femur geometry was derived from a left hip DXA scan. Geometric variables (outcomes) included the femoral neck axis length (FNAL), the femoral neck width (FNW), the neck–shaft angle and FNW|FNAL (an index of robustness). PA was evaluated by accelerometry. Linear regression was used to analyse relationships. Additional exposure variables included body height and mass. In males, leg LST explained 17.4% of variation in FNAL (P < 0.001) and 15% in FNW (P = 0.015). In females, it explained 8.8% of the variance in FNAL (P = 0.020). Associations remained significant in males, but not in females, when vigorous PA was added to the models. These results suggest that public health approaches to promote PA may be particularly important in females since vigorous PA seems to convey advantages in femur geometry and consequently in bone strength.     

Race is nowhere and race is everywhere: narratives from black and white South African university students in post‐apartheid South Africa

This paper examines the life history narratives of a group of 12 black and white male and female undergraduate students at a historically white Afrikaans medium university, now undergoing its own transformation in post‐apartheid South Africa. Conceptualizations of identity and discourse across four elements of context, setting, situated activity and self are employed to examine their accounts. Three framing discourses, comprising the official storyline of a rainbow nation and new higher education policies, the formal storyline of institutional change, and the informal space of relationships and interactions are used to analyse student narratives in terms of how they produce, reproduce and transform race and identity. What emerges is a complicated picture in which identities cannot be simply read off either from the official discourse or from colour and culture as the levels of discourse articulate and collide with a history of racial separateness and context and setting, with particular identity effects.

What varieties of men and women now prevail in this society and in this period? And what varieties are coming to prevail? In what ways are they selected and formed, liberated and repressed, made sensitive and blunted? (Mills, 1959 Mills CW (1959) The sociological imagination (London, Oxford University Press) [Crossref] [Google Scholar], p. 7)     

Thinking Counterfactually Supports Children’s Evidence Evaluation in Causal Learning

Often, the evidence we observe is consistent with more than one explanation. How do learners discriminate among candidate causes? The current studies examine whether counterfactuals help 5-year olds (N = 120) select between competing hypotheses and compares the effectiveness of these prompts to a related scaffold. In Experiment 1, counterfactuals support evidence evaluation, leading children to privilege and extend the cause that accounted for more data. In Experiment 2, the hypothesis that accounted for the most evidence was pitted against children’s prior beliefs. Children who considered alternative outcomes privileged the hypothesis that accounted for more observations, whereas those who explained relied on prior beliefs. Findings demonstrate that counterfactuals recruit attention to disambiguating evidence and outperform explanation when data contrast with existing beliefs.     

Dimensions of higher education and the public good in South Africa

The focus is on the micro-possibilities of student capabilities formation as the end of public-good higher education, rather than on a systems or organizations approach more commonly found in discussions of the public good and higher education. This does not discount other valuable public-good ends. Using South Africa as a global South context, a capability-based approach to the public good of higher education is proposed for its humanizing ethic, attention to fair opportunities, and participation in terms of what students are able to do and to be in and through higher education. A capability frame is complemented by thinking about decoloniality and epistemic justice to help identify central higher education capabilities. The three proposed intersecting capability dimensions are as follows: personhood self-formation, epistemic contribution, and sufficiency of economic resources, intended to guide university practices and policy interventions in the direction of the public good. By populating the space of the public good with capabilities, a shift is made away from micro-economics which see the public good as a reductionist space of commodities and human capital development. Higher education is rather understood as having both instrumental and intrinsic value, generating an alternative logic to that of neo-liberalism, and an individualist ontology of competition and untrammeled markets. The pressures of the global context are acknowledged so that the public good is understood as both “ideal-aspirational” but also “practical-feasible” in the light of local South African conditions. An expanded capability-based framing would contribute to reducing higher education inequalities as a public-good and public-accountable contribution by universities.     

Weaving Curriculum Connections in International Baccalaureate (IB) Schools

In this article we discuss how school leaders address challenges when implementing innovative international education curricula, namely International Baccalaureate (IB) programs. Specifically, we frame challenges in curriculum implementation of and transition between IB programs from a “disconnection” perspective. We have often noticed when innovative programs are parceled together without preparation and thrust at great speed at schools, they become disconnected. The hasty implementation of multiple IB programs simultaneously at a school also causes disconnection. Drawing on extensive interview data from principals, mid-level leaders, and teachers in five IB schools adopting multiple IB programs in Asia, we detail curriculum disconnection facing IB schools and how school leaders, including teacher leaders, address such challenges by weaving various disconnected points, namely instrumental, intellectual, cultural, professional, and communicative disconnections. Based on findings from the multisite case study, we argue that school leaders in the case of IB schools adopt a range of leadership strategies to weave disconnection points. We reframe the leadership strategies as two aspects of distributed leadership: distributed instructional leadership and teacher leadership. In conclusion, we suggest that a central facet for successful leadership of IB schools that adopt multiple IB programs is about finding, focusing, and facilitating ways to address disconnections in curriculum implementation of and transition between different IB programs.     

Success by Degrees: Addressing Teacher Shortages through a School-Community College-University Partnership

Using a teacher recruitment and preparation model, a unique partnership between PK–12 schools, a community college, and a university is examined. The focus is on the training and credentialing of future educators, particularly from underrepresented backgrounds, in an efficient and quality manner to assist in meeting the current PK–12 teacher shortage. Data indicate that the partnership is progressing towards, or has met, its targets in addressing said shortage.