Changes in mechanical properties of sprinting during repeated sprint in elite rugby sevens athletes

This study aimed to analyse fatigue-induced changes in mechanical sprinting properties during a specific repeated-sprint test in elite rugby sevens athletes. Twenty elite rugby sevens players performed ten 40?m sprints on a 30?s cycle with participant’s running back and forth in a marked lane. Radar was used to assess maximal overground sprint performance over each 40?m. Macroscopic mechanical properties (maximal horizontal force (F₀), maximal horizontal power (P_max), maximal ratio of horizontal force (RF_peak), decrease in the ratio of horizontal-to-total force (D_RF), total force and maximal sprinting velocity (v₀)) were drawn from horizontal force velocity relationships, using a validated method applied to the speed–time data. Fatigue-induced changes were analysed comparing the first sprint to an average of 2^nd-4^th, 5^th-7^th and 8^th-10^th. Repeated-sprint ability (RSA) testing induced substantial changes in the maximal velocity component, with a decrease (–15%) in v₀ (effect size (ES)?=?–2.46 to –4.98), and to a lower extent (–5.9%) in the maximal force component F₀ (ES?=?–0.59). D_RF moderately decreased (14%; ES=–0.76–1.11), and RF_peak largely decreased in the later sprints (ES?=?–0.32 to –1.27). Fatigue observed in this RSA test appeared to have a greater effect on the technical ability to produce horizontal force at high velocities, likely due to an alteration in the ability to maintain horizontally oriented force application when velocity increases rather than during the initial acceleration phase, but also the overall force production capacity. The ability to maintain forward-oriented force at high velocities is of central importance for identifying fatigue and monitoring load.     

What is Knowledge in English and Where Does it Come From?

By offering a close reading and interpretation of one conversation between four Year 8 pupils about Robert Swindell’s Stone Cold, I aim to address questions of what might count as knowledge in English and to suggest how it might develop not only out of the qualities of a text, but from particular social relations and a set of pedagogic choices. I argue for a refocusing of attention away from the ‘acquisition’ of ‘cultural capital’ or ‘powerful disciplinary knowledge’ by individual pupils, towards the cultural resources and cultural productivity of pupils and teachers. I go on to suggest that serious consideration of such conversations as evidence of learning poses a significant challenge to dominant theories and research methodologies that locate knowledge and ability within the minds of individual pupils. Instead, my reading of this classroom interaction suggests the creative potential of discussion in diverse, urban classrooms to contribute to a fuller account of learning that pays proper attention to its roots in the social and affective realms. Crucially, part of my argument is that classrooms such as the one in which the conversation took place offer unique opportunities and conditions for the development of a pedagogy that both draws on and negotiates difference and is therefore culturally productive in a wider sense.     

Promoting toddlers' self-regulation and healthy eating habits among families living in poverty: A randomized controlled trial of Recipe 4 Success

The Recipe 4 Success preventive intervention targeted multiple factors critical to the health and well-being of toddlers living in poverty. This randomized controlled trial, which was embedded within Early Head Start home visits for 12 weeks, included 242 racially and ethnically diverse families (51% girls; toddler mean age = 2.58 years; data collected 2016–2019). Compared to parents in usual practice home visits, parents in Recipe 4 Success displayed greater sensitive scaffolding of toddlers' learning and more responsive food parenting practices (Cohen's d = .21–.30). Toddlers in Recipe 4 Success exhibited greater self-regulation and had healthier eating habits (Cohen's d = |.16–.35|). Results highlight the value of Recipe 4 Success in promoting parent and toddler behavior change that could have life-long benefits.     

Solving problems: young children exploring the rules of the game

This article is not a review of the problem-solving literature but instead explores the idea of children developing problem-solving tactics as learning to applying the ‘rules of the game’, based on Wittgenstein's concept of ‘language games’. The kind of learning under discussion here is not learning of facts. I will not be discussing how we learn to recite the two times table but, rather, the dawning of understanding of what those facts mean: when a child realizes that the two times table divides up the whole universe into sets of either odds or evens. The necessity of accepting the rules of the game in order to perceive relevancy in determining problem-solutions was illustrated by Donaldson's (1992) work with small children. The existence of general rules, and hence generic problem-solving skills, is discussed and a model for problem-solving is suggested. The article concludes with some observations on the role of rule-breaking in discovery and invention. Examples are taken from the author's observations of young children in English classrooms.     

Research on interventions for children and young people on the autistic spectrum: a critical perspective

Developing, implementing and evaluating programmes of intervention for children and young people on the autistic spectrum are challenging endeavours. In this paper, we adopt a critical approach to research in this area, and attempt to offer an alternative perspective for understanding and interpreting empirical evaluations. We outline and discuss theoretical, methodological and practical issues and limitations associated with the current research body, and provide illustrative examples of gaps in the current literature.     

Infant educators’ beliefs about infant language development in long day care settings

This study examined infant educators’ beliefs about infant language development in the context of early childhood classrooms. Participants were 59 educators who were employed to work directly with under-two-year-old children. Educators were interviewed to determine their understandings of infant language development and Grounded Theory qualitative techniques were used to develop a conceptual model which illustrates their perceptions of the relationships between contextual, personal and teaching and learning components of their classroom contexts. The model provides a means of conceptualising ‘insider’ practitioner voices on how, as a dynamic system, contextual, individual and pedagogical components mutually interact to bring about the kinds of experiences and interactions that can shape language development. Findings have implications for understanding educators’ perspectives on infant room quality, suggesting that issues related to educator-infant ratios, staff consistency, qualifications and professional knowledge about language development processes may impact efforts to provide intentional language development support.     

Connectedness: Developing a Shared Construction of Affect and Cognition in Children with Autism

Dave Sherratt and Gill Donald teach children with autism at Mowbray School, North Yorkshire. Dave Sherratt also teaches at the University of Birmingham and is honorary research fellow at the University College of York St John. Gill Donald is also a specialist speech and language therapist for Hambleton and Richmondshire Primary Care Trust. In this article, Dave Sherratt and Gill Donald outline an approach to teaching children who are on the autistic spectrum. They describe the social construction of understanding in normally developing children and suggest ways in which this differs in children with autism. These children may have difficulties in attributing relevance to the aspects of experience that are regarded as significant by most learners. The authors suggest that this may account for the poverty in social engagement or connectedness commonly observed in children with autism. Illustrating their propositions with vivid examples from practice, Dave Sherratt and Gill Donald go on to describe ten teaching structures promoting progress from early social engagement; through a shared understanding of objects and observable processes; to a shared understanding of symbolic representation in play, ideas and language. These structures, rooted in a fascinating evocation of theory, will help practitioners striving to develop a shared understanding of self, others and the environment in children with autistic spectrum disorders.