Relay exchanges in elite short track speed skating

In short track speed skating, the relay exchange provides an additional strategic component to races by allowing a team to change the skater involved in the pack race. Typically executed every 1½ laps, it is the belief of skaters and coaches that during this period of the race, time can be gained or lost due to the execution of the relay exchange. As such, the aim of this study was to examine the influence of the relay exchange on a team’s progression through a 5000?m relay race. Using data collected from three World Cup relay events during the 2012–2013 season, the time taken to complete the straight for the scenarios with and without the relay exchange were compared at different skating speeds for the corner exit prior to the straight. Overall, the influence of the relay exchange was found to be dependent on this corner exit speed. At slower corner exit speeds (12.01–13.5?m/s), relay exchange straight times were significantly faster than the free skating scenario (P?<?0.01). While at faster corner exit speeds (14.01–15?m/s), straight times were significantly slower (P?<?0.001). The findings of this study suggest that the current norm of executing relay exchanges every 1½ laps may not be optimal. Instead, varying the frequency of relay exchange execution throughout the race could allow: (1) time to be gained relative to other teams; and (2) facilitate other race strategies by providing an improved opportunity to overtake.     

Predictors of multiple injuries in individual distance runners: A retrospective study of 75,401 entrants in 4 annual races–SAFER XX

BackgroundThere are limited data on factors that predict an increased risk of multiple injuries among distance runners. The objective of this study was to determine risk factors that are predictive of individual runners with a high annual multiple injury risk (MIR).MethodsA retrospective, cross-sectional study at 4 annual (2012–2015) Two Oceans 21.1 km and 56.0 km races in South Africa with 75,401 consenting race entrants. Running-related injury data were collected retrospectively through an online pre-race medical screening questionnaire. The average number of injuries for each runner every year was calculated by taking a runner''s race entry history and injury history into account and categorizing entrants into 4 MIR categories (high, intermediate, low, and very low (reference)). Multiple logistic regression modeling (odds ratios) was used to determine whether the following factors were predictive of a high MIR (average > 1 injury/year): demographics, training and racing, chronic-disease history (composite chronic disease score (CCDS)), and history of allergies.ResultsOf all entrants, 9.2% reported at least 1 injury, and 0.4% of entrants were in the high MIR category; the incidence rate was 2.5 injuries per 10 runner-years (95% confidence interval (95%CI): 2.4–2.7). Significant factors predictive of runners in the high MIR category were: running for > 20 years: OR = 2.0 (95%CI: 1.3–3.1; p = 0.0010); a higher CCDS: OR = 2.2 (95%CI: 2.0–2.4; p < 0.0001); and a history of allergies: OR = 2.8 (95%CI: 2.0–3.8; p < 0.0001).ConclusionRunners who have been running recreationally for > 20 years and those with multiple chronic diseases or a history of allergies were at higher risk of multiple running-related injuries. This high-risk group can be targeted for further study and possible injury-prevention interventions.     

Factor structure of the McCarthy screening test

The factor structure of the McCarthy Screening Test was investigated with a sample of 555 children. The sample consisted of 300 boys and 255 girls, whose mean age was 61.4 months; approximately 80% were white and 20% were black. The data from the present study and from the MST standardization samples were analyzed by a principal components analysis (with ones in the diagonal) followed by a varimax rotation. The results from the data analysis seem to indicate that the subtests all measure parts of the same attribute (cognitive and sensorimotor functions) in varying degrees.     

Systematic quality development work in a Swedish leisure-time centre

There is increasing activity in the area of quality issues in education in Europe. Diverse discourses of policy for quality are encountered in daily practice. This article explores systematic quality development work in a Swedish educational setting: the leisure-time centre. By following 2 teachers’ enactments of policy in planning, organising, documenting, and evaluating the quality of a leisure-time centre and children's achievement of objectives, different logics were found. Tensions in practice that visualise pluralistic intentions in policy and educational approaches were also revealed. Planning and organising as parts of systematic quality development work reveal an emerging individualistic perspective. However, when teachers carry out documentation and evaluation, they reconstruct a social pedagogical approach grounded in the tradition of the leisure-time centre with a group-oriented focus.     

Dissociation between comprehension and pronunciation in dyslexic and hyperlexic children

Findings from an analysis of the reading performances of three reading-disabled children provide a tentative answer to the controversial issue whether reading-disabled children have a language comprehension deficit or not. Of the three reading-disabled children studied, two were poor in language comprehension but had much better word-reading skill. The third disabled reader had superior listening comprehension but was poor in word-reading skill. The two good word-readers appear to use two different strategies, viz., grapheme—sound association and whole word-pronunciation asssociation to pronounce the written word. It is concluded that pronunciation and comprehension skills are two dissociable components of the reading process and that they follow separate courses of development. Case studies presented in this paper suggest that these two components can be affected independent of each other resulting in different types of reading disabilities. It is concluded that answer to the question whether poor readers are also deficient in language comprehension depends on the type of disabled readers investigated even though educational experience and severity of the reading problem can act as confounding factors.

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Kevin: “I Gotta Get to the Market”: The Development of Peer Relationships in Inclusive Early Childhood Settings

This study describes the lived experience of Kevin, a young child with physical disabilities who is placed in an inclusive classroom, a classroom where children with and without disabilities are educated together, with extra support provided for the child with disabilities. Children with disabilities who are placed in inclusive early childhood settings tend to be rejected or neglected more than their typically developing peers and are involved more with the adults in the classroom than with their peers. Kevin’s experiences are framed in the context of the current emphasis on inclusive practices. The study documents that adult assistance and curriculum activities both play an important role in either facilitating or constraining social interaction with peers. When the assigned assistant functions as the child’s playmate and mostly chooses table activities, both of these seem to limit opportunities for social interaction with peers. This study also documents that, without the assistant present, the child makes independent choices such as where and with whom to play. The dramatic play area serves as a conduit for meaningful verbal and nonverbal communication with peers. At the same time, Kevin’s strong desire to play in this area seems to be the impetus for physical development—he walks alone for the very first time. Suggestions are given for teacher facilitation of dramatic play.     

Response strategies in the radial arm maze: Running around in circles

The effects of the size of the central arena on the use of response strategies by rats on an eight-arm elevated maze were examined. The size of the central arena had no effect on accuracy, but the use of adjacent arms increased significantly with a larger central arena, regardless of the size of arena to which rats were first exposed. These results are interpreted in terms of foraging efficiency.

     

Reading and cognitive abilities: Longitudinal studies of brain and behavior changes in young children

This paper focuses on methods useful for identifying differences in the development of language reading abilities in children that rely on measures of brain responses and behavioral assessments. Findings from longitudinal and cross-sectional studies using brain and behavior measures are described, along with findings from research designed to influence changes in brain and behavioral responses through training. The findings show differences in event-related potentials (ERP) responses recorded at birth that are related to a child’s later performance on language and reading tasks. Such findings point to a strong biological influence on the development of language and reading skills. However, other findings show that the influence of biological factors on brain processing can be modified through learning. In fact, several studies show that even brief periods of stimulation and opportunities for learning can produce changes in the brain’s ERP repsonses. Such findings suggest that new approaches to evaluating the effectiveness of interventions might change the rate and likelihood of developmental changes.     

THE DETERMINATION AND EVALUATION OF RESULTS IN THE STUDY PROCESS

Student assessment and grading schemes in higher education institutions should be adapted and applied in such a way that they stimulate students to achieve to the utmost of their abilities. It is not sufficient to simply give a grade to a student for a task accomplished or even to give him an average grade for a series of tasks accomplished during a given time period, a semester, for instance. Rather it is necessary to create an action framework of a kind which links the performance dynamic of both students and teachers so as to ensure the accurate determination, evaluation, and analysis of the joint student‐teacher performance behaviour in such a way that the individual procedures subject to evaluation can be grouped into joint procedures which stimulate self‐determination self‐evaluation, and self‐analysis on the part of students, teachers, and eventually, the employers of graduates. The authors have designed two models which illustrate optimum evaluation procedures of the kind which they favour.