Effect of sand versus grass training surfaces during an 8-week pre-season conditioning programme in team sport athletes     

Martyn John Binnie  Brian Dawson  Mark Alexander Arnot  Hugh Pinnington  Grant Landers  Peter Peeling 《Journal of sports sciences》2013,31(11):1001-1012

Abstract

This study compared the use of sand and grass training surfaces throughout an 8-week conditioning programme in well-trained female team sport athletes (n = 24). Performance testing was conducted pre- and post-training and included measures of leg strength and balance, vertical jump, agility, 20 m speed, repeat speed (8 × 20 m every 20 s), as well as running economy and maximal oxygen consumption (VO_2max). Heart rate (HR), training load (rating of perceived exertion (RPE) × duration), movement patterns and perceptual measures were monitored throughout each training session. Participants completed 2 × 1 h conditioning sessions per week on sand (SAND) or grass (GRASS) surfaces, incorporating interval training, sprint and agility drills, and small-sided games. Results showed a significantly higher (P < 0.05) HR and training load in the SAND versus GRASS group throughout each week of training, plus some moderate effect sizes to suggest lower perceptual ratings of soreness and fatigue on SAND. Significantly greater (P < 0.05) improvements in VO_2max were measured for SAND compared to GRASS. These results suggest that substituting sand for grass training surfaces throughout an 8-week conditioning programme can significantly increase the relative exercise intensity and training load, subsequently leading to superior improvements in aerobic fitness.  相似文献   

The Influence of Aging on Power and Endurance in Man     

Percy M. Dawson 《Research quarterly for exercise and sport》2013,84(2):95-101

Abstract

The purpose of this study was to examine the strength-decrement fatigue effects in 14 muscle groups of the trunk and lower extremities resulting from a sub-maximal treadmill run at seven miles per hour for a period of ten minutes on a horizontal plane. Only two muscle groups, the hip outward rotators and the trunk flexors, were fatigued sufficiently to cause a significant strength decrement; a third muscle group, the knee flexors, had a loss in mean strength which approached the .05 level of confidence.  相似文献   

Threats to student evaluative judgement and their management     

Gordon Joughin  David Boud  Phillip Dawson 《高等教育研究与发展》2019,38(3):537-549

ABSTRACT

Students’ capacity for making evaluative judgements of their own work is widely acknowledged as central to their learning within programmes as well as being vital to their subsequent professional practice. In higher education literature, the act of evaluative judgement is usually portrayed as a process of deliberative, analytical reasoning requiring student agency and objectivity, typically scaffolded by points of reference such as explicit criteria, rubrics or exemplars. This article challenges this common portrayal of judgement by drawing attention to research from outside higher education on the role of unconscious factors in judgement and decision-making. Drawing from the field of heuristics and bias studies, the article outlines six unconscious factors that have the potential to distort students’ analytical judgement of their work. A recent challenge to the heuristics and bias approach that radically repositions the place of reasoning in judgement is also considered. Since these unconscious factors have received scant attention in higher education literature, the purpose of this article is to draw attention to them, to identify the challenges they pose to current understandings of evaluative judgement, and to outline their implications for enhancing assessment practice.  相似文献   

Constraints to curriculum reform: Teachers and the myths of schooling     

Kenneth Tobin  George Dawson 《Educational technology research and development : ETR & D》1992,40(1):81-92

Curriculum reform efforts usually have ignored the culture in which curriculum is embedded. Principal components of the culture are the knowledge of teachers and the myths of this culture. Images, metaphors, and metonymies are forms of teacher knowledge that influence the manner in which teachers define their roles and implement the curriculum. Unless endeavors are made to facilitate teacher learning through the construction of new images, metaphors, and metonymies, it is unlikely that curricular reform will proceed in the intended manner. Similarly, the myths that define the customs and taboos of a culture need to be considered by instructional designers if their curricular resources are to be used as intended. The myths ofteacher as controller of students andobjectivism together might persuade teachers to adhere to the more traditional approach whereby knowledge is transferred to students in teacher-controlled activities.This article describes theScience Vision series, a hypermedia system developed in response to a clear need for additional resources to educate teachers concerning alternative myths and their use in relation to utilizing resources.  相似文献   

Cognitive conflict: Its nature and use in the teaching of science     

J. A. Rowell  C. J. Dawson 《Research in Science Education》1979,9(1):169-175

Summary The thrust of this article is that although different theories may share some of the same terminology they may differ considerably in the interpretation which they impose on it and, therefore, on the educational practices which they underwrite. Specifically a brief examination has been made here of the concept of cognitive conflict as it occurs in the theories of Bruner, Case and Piaget-Inhelder, and of the similarities and differences in classroom practices which arise from theoretical commitment.  相似文献   

Factors influencing environmental attitude: The relationship between environmental attitude defensibility and cognitive reasoning level     

James R. Yount  Phillip B. Horton 《科学教学研究杂志》1992,29(10):1059-1078

The purpose of this study was to investigate the relationship between factors believed to contribute to the formation of environmental attitudes by college nonscience majors. Key relationships addressed were the effects of a university environmental studies course on (a) environmental attitudes, (b) the amount of factual information that is brought to bear on an environmental attitude decision (defensibility), and (c) the linkages between the affective and the cognitive domains of freshman and sophomore students. When compared to the control group, the students who attended an environmental studies class did not significantly change their attitudes, but they did exhibit increases in their total [F(3, 132) = 5.91, p < 0.01] and count [F(3, 132) = 4.86, p < 0.01] levels of defensibility. These findings corroborate work performed by Kinsey (1978) and Kinsey and Wheatley (1980, 1984). In addition, students in the environmental studies course who had higher cognitive reasoning scores were more prone to increase defensibility [F(6, 129) = 3.78, p < 0.01]. These data imply a linkage between cognitive and affective domains in the environmental attitude decision-making process.  相似文献   

Cycles of Research and Application in Education: Learning Pathways for Energy Concepts     

Theo L. Dawson  Zachary Stein 《Mind, Brain, and Education》2008,2(2):90-103

ABSTRACT— We begin this article by situating a methodology called developmental maieutics in the emerging field of mind, brain, and education. Then, we describe aspects of a project in which we collaborated with a group of physical science teachers to design developmentally informed activities and assessments for a unit on energy. Pen-and-paper assessments, called teasers , were employed, along with interviews, to study how students learned about the physics of energy. Results were used to describe students' learning pathways and to design a scoring rubric for teacher use. We hypothesized that (a) teasers, by themselves, could be used effectively to evaluate the developmental level of students' reasoning about energy and (b) teachers could employ the scoring rubric with minimal instruction. Encouraged by our findings, we went on to create a freely available online version of the energy teaser , including a new rubric designed to improve the accuracy with which teachers can assess the developmental level of students' energy conceptions.  相似文献   

Our anonymous online research participants are not always anonymous: Is this a problem?     

Phillip Dawson 《British journal of educational technology : journal of the Council for Educational Technology》2014,45(3):428-437

When educational research is conducted online, we sometimes promise our participants that they will be anonymous—but do we deliver on this promise? We have been warned since 1996 to be careful when using direct quotes in Internet research, as full‐text web search engines make it easy to find chunks of text online. This paper details an empirical study into the prevalence of direct quotes from participants in a subset of the educational technology literature. Using basic web search techniques, the source of direct quotes could be found in 10 of 112 articles. Analysis of the articles revealed previously undiscussed threats from data triangulation and expert analysis/diagnosis. Issues of ethical obliviousness, obscurity and concern for future privacy‐invasive technologies are also discussed. Recommendations for researchers, journals and institutional ethics review boards are made for how to better protect participants' anonymity against current and future threats.  相似文献   

Visual‐attentional span and lexical ­decision in skilled adult readers     

Virginia M. Holmes  Georgia Dawson 《Journal of Research in Reading》2014,37(4):331-355

The goal of the study was to examine the association between visual‐attentional span and lexical decision in skilled adult readers. In the span tasks, an array of letters was presented briefly and recognition or production of a single cued letter (partial span) or production of all letters (whole span) was required. Independently of letter recognition and phoneme awareness, width of partial recognition span predicted substantial variance only in detection of letter misorderings in words, while partial span efficiency made small contributions to decisions on regular words and pseudowords, but not strange words. With a production format and the inclusion of short‐term phonological memory, neither partial‐span nor whole‐span measures contributed positive independent variance to word and nonword decisions. The results provide meagre support for the idea that skilled adult readers with a wide visual‐attentional span might process words more effectively than those with a narrow span during lexical decision.  相似文献   

A contribution to the history of assessment: how a conversation simulator redeems Socratic method     

Robert Nelson  Phillip Dawson 《Assessment & Evaluation in Higher Education》2014,39(2):195-204

Assessment in education is a recent phenomenon. Although there were counterparts in former epochs, the term assessment only began to be spoken about in education after the Second World War; and, since that time, views, strategies and concerns over assessment have proliferated according to an uncomfortable dynamic. We fear that, increasingly, education is assessment-led rather than learning-led and ‘counter to what is desired’ in an ugly judgemental spirit whose moral underpinnings deserve scrutiny. In this article, we seek to historicise assessment and the anxieties of credentialising students. Through this longer history, we present a philosophy of assessment which underlies the development of a new method in assessment-as-learning. We hope that our development of a conversation simulator helps restore the innocence of education as learning-led, while still delivering on the incumbencies of assessment.  相似文献