Effects of timing of signal indicating jump directions on knee biomechanics in jump-landing-jump tasks

A variety of the available time to react (ATR) has been utilised to study knee biomechanics during reactive jump-landing tasks. The purpose was to quantify knee kinematics and kinetics during a jump-land-jump task of three possible directions as the ATR was reduced. Thirty-four recreational athletes performed 45 trials of a jump-land-jump task, during which the direction of the second jump (lateral, medial or vertical) was indicated before they initiated the first jump, the instant they initiated the first jump, 300 ms before landing, 150 ms before landing or at the instant of landing. Knee joint angles and moments close to the instant of landing were significantly different when the ATR was equal to or more than 300 ms before landing, but became similar when the ATR was 150 ms or 0 ms before landing. As the ATR was decreased, knee moments decreased for the medial jump direction, but increased for the lateral jump direction. When the ATR is shorter than an individual’s reaction time, the movement pattern cannot be pre-planned before landing. Knee biomechanics are dependent on the timing of the signal and the subsequent jump direction. Precise control of timing and screening athletes with low ATR are suggested.     

The role of effort in moderating the anxiety – performance relationship: Testing the prediction of processing efficiency theory in simulated rally driving

Abstract

We tested some of the key predictions of processing efficiency theory using a simulated rally driving task. Two groups of participants were classified as either dispositionally high or low anxious based on trait anxiety scores and trained on a simulated driving task. Participants then raced individually on two similar courses under counterbalanced experimental conditions designed to manipulate the level of anxiety experienced. The effort exerted on the driving tasks was assessed though self-report (RSME), psychophysiological measures (pupil dilation) and visual gaze data. Efficiency was measured in terms of efficiency of visual processing (search rate) and driving control (variability of wheel and accelerator pedal) indices. Driving performance was measured as the time taken to complete the course. As predicted, increased anxiety had a negative effect on processing efficiency as indexed by the self-report, pupillary response and variability of gaze data. Predicted differences due to dispositional levels of anxiety were also found in the driving control and effort data. Although both groups of drivers performed worse under the threatening condition, the performance of the high trait anxious individuals was affected to a greater extent by the anxiety manipulation than the performance of the low trait anxious drivers. The findings suggest that processing efficiency theory holds promise as a theoretical framework for examining the relationship between anxiety and performance in sport.     

Skating to Armageddon: Canada,Hockey and the First World War

The founding of the Korean Women Taekwondo Federation means the fetal movement of women taekwondo in Korea and it can be said to have been quite significant in that it increased women's confidence in their statuses and activities in the environments of the times when women's social activities were increasing. The development of women taekwondo competitions began in earnest when the first women taekwondo hall in the world was opened as a result of passionate activities of early female taekwondo practitioners and the first taekwondo club was established in Ehwa Woman's University. Women's aspiration towards the challenge to the Olympic Games as well as international competitions is gradually increasing through the expansion of the base of women taekwondo. The status of women taekwondo in Korea that has been enhanced through challenges to various international competitions thus far beginning with the single taekwondo championship of foreigners in Korea in 1968 can be said to have contributed to the enhancement of the status of Korea as the birthplace of taekwondo and it is considered that women taekwondo could have continuously developed through diverse taekwondo championships by age held with women's steady effort and the expansion of the base of women taekwondo instructors.     

Challenges to Cognitive Bases for an Especial Motor Skill at the Regulation Baseball Pitching Distance

We tested expert baseball pitchers for evidence of especial skills at the regulation pitching distance. Seven college pitchers threw indoors to a target placed at 60.5 feet (18.44 m) and four closer and four further distances away. Accuracy at the regulation distance was significantly better than predicted by regression on the nonregulation distances (p < .02), indicating an especial skill effect emerged despite the absence of normal contextual cues. Self-efficacy data failed to support confidence as a mediating factor in especial skill effect. We concluded that cognitive theories fail to fully account for the patterns of observed data, and therefore theoretical explanations of the especial skills must address noncognitive aspects of motor learning and control.     

U.S. competitiveness in international information trade

Abstract

American competitiveness in international information services trade will be determined by the skill with which government and industry can improve the coordination of commercial and technical policies and actions. This article examines some of the key issues, including federal R&D funding, tariff policies, economic assistance programs, and international technical standards.     

Individualised educational programmes. Part I: a literature review

This review was undertaken as part of a research project commissioned by the Scottish Executive and carried out by a team from Glasgow and Newcastle Universities between January 2000 and January 2001 when the report was published ( Banks et al., 2001 ). The research study, entitled 'Raising the Attainment of Pupils with Special Educational Needs', followed the issuing of new guidelines ( SOEID, 1998a ; SEED, 1999 ) which linked the use of individualised educational programmes (IEPs) to the wider political enterprise of raising standards through target-setting.     

Developing the adult independent learner: Information literacy and the remote external student

This paper analyses current opinion on the development of information literacy skills amongst adult students at tertiary institutions. It looks at the rapid changes taking place in tertiary education and in the development of lifelong learning opportunities for adults. It examines closely the concept of the adult independent learner and how information literacy contributes to this concept. It also examines the plight of there mote external students and hownew communications technologies could be used to improve their levels of information literacy.     

The Effect of an Analysis-of-Practice,Videocase-Based,Teacher Professional Development Program on Elementary Students' Science Achievement

This article describes the effects of an analysis-of-practice professional development (PD) program on elementary school students' (Grades 4–6) science outcomes. The study design was a cluster-randomized trial with an analysis sample of 77 schools, 144 teachers and 2,823 students. Forty-two schools were randomly assigned to treatment, (88.5 hours) of integrated analysis-of-practice and content deepening PD (over the course of one year) while 35 schools were randomly assigned to receive an equal number of PD hours in science content deepening alone. Students' content knowledge, as measured by a project-specific test, was compared across treatment groups. The effect size for this comparison was 0.52 standard deviations in favor of students whose teachers participated in the PD that included analysis-of-practice. This effect compares favorably to that of other elementary school interventions whose effectiveness was studied with a narrowly focused outcome measure. Analysis of the demographics of the study schools suggests that the treatment effect could be relevant outside the local study context. Implications for future research include tests of mediation for teacher-level outcomes and efficacy tests of specific teaching strategies (intervention subcomponents).     

At the early childhood level

Conclusion Environmental education at the early childhood level is about fostering a sense of appreciation and caring. The adult's role in the process is primarily that of sharing versus instructing: “sharing enthusiasm, curiosity, and wonder” (Dighe, 1993. p. 59). Helping young children grow in their understanding and appreciation of the natural world can greatly benefit the development of the child and has the potential for enhancing the humanearth relationship.     

Pupil guidance: An integral part of teacher education and development in Scotland?

Many schools throughout the UK are experiencing challenging behaviour from pupils and high levels of absence and exclusion as they seek to implement initiatives aimed at raising pupil attainment [National Audit Office (2005). Improving school attendance, London: The Stationery Office]. These initiatives often presuppose that pupils will receive adequate levels of guidance and support to help them make curricular, personal, social, and health decisions. However, little is heard from teachers and students undertaking initial teacher education courses on how they have been prepared for this extended role of supporting increasing diverse student populations; nor do we know how they define guidance/pupil support and integrate this with their concept of the professional role of a teacher. This article presents evidence from a one-year study of pupil support in Scotland commissioned by the Scottish Executive Education Department. The study provided evidence for The National Review of Guidance Provision in Scotland [Scottish Executive (2003). The national review of guidance. Edinburgh: Scottish Executive; Scottish Executive (2005). Happy, safe and achieving their potential. Edinburgh: Scottish Executive]. The study explored the views of all 32 local authorities in Scotland, a sample of students in training in two universities and teachers, headteachers and pupils in eight case study schools, and also a sample of their parents. This article focuses specifically on the findings relating to teachers and students in training. It identifies the ways in which they support pupils and how well they think they have been prepared for that task. Two dominant models of pupil support emerge from these data: an embedded and a specialist approach, and these vary according to school and education sector. Primary school teachers were more likely to embed pupil support into their concept of being teachers, whereas secondary teachers perceived it to be a separate, specialist function, which many were reluctant to undertake. Some implications for teacher education are highlighted.