Validity Evidence of an Electronic Portfolio for Preservice Teachers     

Yuankun Yao  Matt Thomas  Nicole Nickens  Joyce Anderson Downing  Ruth S. Burkett  Sharon Lamson 《Educational Measurement》2008,27(1):10-24

This study applied Messick's unified, multifaceted concept of construct validity to an electronic portfolio system used in a teacher education program. The subjects included 128 preservice teachers who recently completed their final portfolio reviews and student teaching experiences. Four of Messick's six facets of validity were investigated for the portfolio in this study, along with a discussion of the remaining facets examined in two previous studies. The evidence provided support for the substantive and generalizability aspects of validity, and limited support for the content, structural, external, and consequential aspects of validity. It was suggested that the electronic portfolio may be used as one requirement for certification purposes, but may not be valid for the purpose of assessing teacher competencies .  相似文献   

A Twin and Adoption Study of Reading Achievement: Exploration of Shared-Environmental and Gene-Environment-Interaction Effects     

Kirkpatrick RM  Legrand LN  Iacono WG  McGue M 《Learning and individual differences》2011,21(4):368-375

Existing behavior-genetic research implicates substantial influence of heredity and modest influence of shared environment on reading achievement and reading disability. Applying DeFries-Fulker analysis to a combined sample of twins and adoptees (N = 4,886, including 266 reading-disabled probands), the present study replicates prior findings of considerable heritability for both reading achievement and reading disability. A simple biometric model adequately described parent and offspring data (combined N = 9,430 parents and offspring) across differing types of families present in the sample Analyses yielded a high heritability estimate (around 0.70) and a negligible shared-environmentality estimate for both reading achievement and reading disability. No evidence of gene × environment interaction was found for parental reading ability and parental educational attainment, the two moderators analyzed.  相似文献   

The effect of normal load force and roughness on the dynamic traction developed at the shoe–surface interface in tennis     

James Clarke  Sharon J. Dixon  Loic Damm  Matt J. Carré 《Sports Engineering》2013,16(3):165-171

During tennis-specific movements, such as accelerating and side stepping, the dynamic traction provided by the shoe–surface combination plays an important role in the injury risk and performance of the player. Acrylic hard court tennis surfaces have been reported to have increased injury occurrence, partly caused by increased traction that developed at the shoe–surface interface. Often mechanical test methods used for the testing and categorisation of playing surfaces do not tend to simulate loads occurring during participation on the surface, and thus are unlikely to predict the human response to the surface. A traction testing device, discussed in this paper, has been used to mechanically measure the dynamic traction force between the shoe and the surface under a range of normal loading conditions that are relevant to real-life play. Acrylic hard court tennis surfaces generally have a rough surface topography, due to their sand and acrylic paint mixed top coating. Surface micro-roughness will influence the friction mechanisms present during viscoelastic contacts, as found in footwear–surface interactions. This paper aims to further understand the influence micro-roughness and normal force has on the dynamic traction that develops at the shoe–surface interface on acrylic hard court tennis surfaces. The micro-roughness and traction of a controlled set of acrylic hard court tennis surfaces have been measured. The relationships between micro-roughness, normal force, and traction force are discussed.  相似文献   

The effects of surface traction characteristics on frictional demand and kinematics in tennis     

LoI¨c Damm  Daniel Low  Andrea Richardson  James Clarke  Matt Carré  Sharon Dixon 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(4):389-402

The interaction between footwear and surfaces influences the forces experienced by tennis players. The purpose of this study was to investigate traction demand and kinematic adaptation during tennis-specific movements with changes in traction characteristics of surfaces. We hypothesised that players would increase the utilised coefficient of friction (horizontal to vertical ground reaction force ratio) when the shoe surface combination had a high coefficient of friction and flex their knee after contact to facilitate braking. Eight participants performed two separate movements, side jump out of stance and running forehand. Ground reaction force was measured and three-dimensional kinematic data were recorded. Clay surface and cushioned acrylic hard court (low vs. high shoe–surface friction) were used. The peak utilised coefficient of friction was greater on clay than the hard court. The knee was less flexed at impact on clay ( ? 5.6 ± 10.2°) and at peak flexion ( ? 13.1 ± 12.0°) during the running forehand. Our results indicate that tennis players adapt the level of utilised friction according to the characteristics of the surface, and this adaptation favours sliding on the low friction surface. Less knee flexion facilitates sliding on clay, whereas greater knee flexion contributes to braking on the hard court.  相似文献   

Relationships between computational thinking and the quality of computer programs     

Boom  Kay-Dennis  Bower  Matt  Siemon  Jens  Arguel  Amaël 《Education and Information Technologies》2022,27(6):8289-8310

Education and Information Technologies - Computational thinking – the ability to reformulate and solve problems in ways that can be undertaken by computers – has been heralded as a...  相似文献   

Webquest learning as perceived by higher-education learners     

Zheng  Robert  Stucky  Bradd  McAlack  Matt  Menchana  Mike  Stoddart  Sue 《TechTrends》2005,49(4):41-49

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Recruiting,Funding, and Hiring of Doctoral Students in Physical Education Teacher Education     

Barbara Ann Boyce  Matt Curtner-Smith  Oleg Sinelnikov 《Quest (Human Kinetics)》2016,68(4):394-405

ABSTRACT

This article examines trends and issues surrounding recruiting, funding, and hiring of doctoral physical education teacher education (D-PETE) students and graduates. Sources for this examination were background data collected by Boyce and her colleagues, the existing literature on these topics, and qualitative data gathered from 30 sport pedagogists during one round-table session at the National Association for Kinesiology in Higher Education (NAKHE) conference in January 2015. All three sources indicated the importance of recruiting and funding of students and hiring of graduates to the future of D-PETE programs. A number of paths were identified which sport pedagogists could follow in order to keep D-PETE programs safe and help them flourish. Unfortunately, agreement as to which of these paths the field should take was often in short supply. In the conclusions section, suggestions for future research of recruiting, funding, and hiring are made with the goal of providing data which could lead to sport pedagogists making more informed decisions regarding the future direction of D-PETE.  相似文献   

Embedded Technical Expression: Code and the Leveraging of Functionality     

Matt Ratto 《The Information Society》2013,29(3):205-213

Abstract

In this article, I argue that a key problem for understanding the social ramifications of software is an implicit separation of software programs into two separate elements: expressive aspects, which are seen as socially driven and affectual, and functional aspects, understood as scientific and rational. In order to overcome this binary, I develop an alternative framework that examines the ways software expresses best practices, correct behaviors, and social organization. A key element of this framework is an understanding of software programs as simultaneously rhetorical and tangible objects. Given that Western society is dependent on sociotechnical systems in which software plays a crucial role, understanding the complex ways software expresses normative tasks, practices, and social orders is increasingly important.  相似文献   

A re-examination of the benefits of exercise for state body satisfaction: Consideration of individual difference factors     

Matt Fuller-Tyszkiewicz  Helen Skouteris  Marita Mccabe 《Journal of sports sciences》2013,31(7):706-713

Abstract

Although the link between exercise and body image is well documented, the considerable inter-individual variability in this relationship has been largely ignored. Therefore, the aim of the present study was to test the contributions of key body image and exercise-related moderators (age, body mass index (BMI), exercise frequency, trait body dissatisfaction, internalisation of appearance standards, and body surveillance tendencies) in predicting variability in the exercise-body satisfaction relationship. Thirty-seven undergraduate women completed a questionnaire containing the above trait-based measures and then carried a Personal Digital Assistant (PDA) for a 7-day period. Participants were instructed to use the PDA to self-report their state body satisfaction immediately following an exercise session and also when the PDA signalled at each of six random intervals throughout the day. Multilevel modelling revealed a bi-directional relationship between exercise and state body satisfaction. Moreover, post-exercise increases in state body satisfaction were strongest for individuals who were younger and engaged in regular exercise, and weakest for individuals with high BMI and/or the tendency to compare their appearance with others. These findings highlight potential limits on the efficacy of exercise-based therapy for body image disturbances.  相似文献   

The influence of` preseason training phase and training load on body composition and its relationship with physical qualities in professional junior rugby league players     

Nick Dobbin  Adrian Gardner  Matt Daniels  Craig Twist 《Journal of sports sciences》2013,31(24):2778-2786

ABSTRACT

This study investigated changes in body composition in relation to training load determined using RPE and duration (sRPE), and its relationship with physical qualities over a preseason period. Sixteen professional academy players (age = 17.2 ± 0.7 years; stature = 179.9 ± 4.9 cm; body mass = 88.5 ± 10.1 kg) participated in the study. Body composition was assessed before and after each training phase and physical qualities assessed at the start and end of preseason. Across the whole preseason period, skinfold thickness, body fat percentage and fat mass were most likely lower (ES = ?0.73 to ?1.00), and fat free mass and lean mass were likely to most likely higher (ES = 0.31 to 0.40). Results indicated that the magnitude of change appeared phase-dependent (ES = ?0.05 to ?0.85) and demonstrated large individual variability. Changes in physical qualities ranged from unclear to most likely (ES = ?0.50 to 0.64). Small to moderate correlations were observed between changes in body composition, and TL with changes in physical qualities. This study suggests training phase and TL can influence a player’s body composition; that large inter-participant variability exists; and that body composition and TL are related to the change in physical qualities.  相似文献