Affective responses to supervised 10-week programs of resistance exercise in older adults     

Darren L. Richardson  Michael J. Duncan  Alfonso Jimenez  Paul M. Juris  Neil D. Clarke 《运动与健康科学(英文)》2020,9(6):604-613

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The biomechanical characteristics of high-performance endurance running     

Stephen J. Preece  Christopher Bramah  Duncan Mason 《European Journal of Sport Science》2019,19(6):784-792

The biomechanical profile of high-level endurance runners may represent a useful model that could be used for developing training programmes designed to improve running style. This study, therefore, sought to compare the biomechanical characteristics of high-performance and recreational runners. Kinematic and kinetic measurements were taken during overground running from a cohort of 14 high-performance (8 male) and 14 recreational (8 male) runners, at four speeds ranging from 3.3 to 5.6?m?s^?1. Two-way ANOVA analysis was then used to explore group and speed effects and principal component analysis used to explore the interdependence of the tested variables. The data showed the high-performance runners to have a gait style characterised by an increased vertical velocity of the centre of mass and a flight time that was 11% longer than the recreational group. The high-performance group were also observed to adopt a forefoot strike pattern, to contact the ground with their foot closer to their body and to have a larger ankle moment. Importantly, although observed group differences were mostly independent of speed, the tested variables showed a high degree of interdependence suggesting an underlying unitary phenomenon. This is the first study to compare high-performance and recreational runners across a full range of kinematic and kinetic variables. The results suggest that high-performance runners maintain stride length with a prolonged aerial phase, rather than by landing with a more extended knee. These findings motivate future intervention studies that should investigate whether recreational runners could benefit from instruction to decrease shank inclination at foot contact.  相似文献   

Validation of the swimming competence questionnaire for children     

Derwin K. C. Chan  Alfred Sing Yeung Lee  Duncan J. Macfarlane  Martin S. Hagger  Kyra Hamilton 《Journal of sports sciences》2020,38(14):1666-1673

ABSTRACT

Two studies were employed to test the reliability and validity of the Swimming Competence Questionnaire (SCQ) among primary school children. Study 1 was a cross-sectional survey in 4959 primary school children. Study 2 was a pre-post-test quasi-experiment among 1609 primary school children who underwent a 20-lesson learn-to-swim programme. In Study 1, exploratory structural equation modelling revealed excellent goodness-of-fit and scale reliability for a two-factor model comprising distance and skill factors, which supported the construct and convergent validity. SCQ scores were significantly and positively correlated with swimming outcomes (i.e., self-efficacy, intention, swimming frequency), which supported SCQ’s concurrent and criterion validity. Average variance extracted for the SCQ factors exceeded cut-off criteria supporting discriminant validity. In Study 2, pre-test SCQ scores correlated significantly and positively with the SCQ scores, self-efficacy, intention, and swimming frequency at post-test, which supported SCQ’s test-retest reliability and predictive validity. Positive intraclass correlation between SCQ scores and coach ratings at post-test provided evidence for SCQ’s inter-rater reliability. SCQ scores significantly improved at post-test, which supported SCQ’s ecological validity. In conclusion, findings indicate that the SCQ is a valid and reliable measure to assess primary school children’s swimming competence, in terms of swimming distance and basic water survival skills.  相似文献   

Using decision support systems to facilitate the social process of knowledge management     

Gilberto?Montibeller  Duncan?ShawEmail author  Mark?Westcombe 《知识管理研究与实践》2006,4(2):125-137

The social processes involved in engaging small groups of 3–15 managers in their sharing, organising, acquiring, creating and using knowledge can be supported with software and facilitator assistance. This paper introduces three such systems that we have used as facilitators to support groups of managers in their social process of decision-making by managing knowledge during face-to-face meetings. The systems include Compendium, Group Explorer (with Decision Explorer) and V*I*S*A. We review these systems for group knowledge management where the aim is for better decision-making, and discuss the principles of deploying each in a group meeting.  相似文献   

Working Together: Integrating Computational Modeling Approaches to Investigate Complex Phenomena     

Bielik  Tom  Fonio  Ehud  Feinerman  Ofer  Duncan  Ravit Golan  Levy  Sharona T. 《Journal of Science Education and Technology》2021,30(1):40-57

Journal of Science Education and Technology - Complex systems are made up of many entities, whose interactions emerge into distinct collective patterns. Computational modeling platforms can provide...  相似文献   

Data‐driven refinements of a genetics learning progression     

Moraima Castro‐Faix  Ravit Golan Duncan  Jinnie Choi 《科学教学研究杂志》2021,58(1):3-39

Learning progressions are theoretical models that describe learning of scientific ideas and practices over time. These hypothetical progressions need to be tested and refined in order to productively inform instruction and assessment. In this paper, we report our attempts to revise a learning progression in genetics. In particular, we focused on two constructs that embody core ideas in classical genetics and one molecular construct. The revisions are based on analysis of pre‐ and postinterview data obtained from sixty 11th grade students before and after they engaged in a 10‐week unit that addressed these concepts. We found that while many of the students held ideas that aligned with the progression, there were several distinct dimensions of student reasoning that were not captured and led to substantial revisions of the constructs including: (a) the splitting of the construct dealing with meiosis (E) into two subconstructs (E1‐physical passage of genetic information and E2 – the role of sex cells), (b) the addition of new levels to constructs dealing with the universal nature and organization of the genetic code (A) and construct (F). For Construct A, the lower levels were expanded to include ideas about the localization of DNA in cells and to include ideas about the composition of DNA that were not captured in the progression. Revisions to Construct F included the expansion of existing levels and the addition of modes of inheritance such as codominance and incomplete dominance. The research we present offers insights about a methodological approach that can be used to test and refine progressions, as well as insights about student learning in genetics as we further describe and expand the stepping‐stone ideas in the progression and discuss further the multidimensional nature of learning progressions.  相似文献   

A pragmatic approach to courseware development in WIMP environments     

Charles Duncan 《British journal of educational technology : journal of the Council for Educational Technology》1990,21(1):31-40

Courseware development often involves a great deal of effort. One approach to minimising effort while maintaining flexibility is illustrated, using a tutoring system as an example. The system comprises two parts: a 'shell' which contains facilities useful for many different subjects, and an interpreter which generates questions which are subject specific.  相似文献   

The biggest extension of rights in Europe? Needs,rights and children with additional support needs in Scotland     

Sheila Riddell  Duncan Carmichael 《International Journal of Inclusive Education》2019,23(5):473-490

ABSTRACT

The Education (Additional Support for Learning) (Scotland) Act 2004 boosted the rights of parents of children with additional support needs (ASN) by improving access to information, instituting a Code of Practice and establishing new redress mechanisms such as the ASN Tribunal and independent mediation. More than a decade later, Scottish legislation enacted in 2016 and implemented in 2018 attempted to increase children’s rights, broadly placing them on a par with those of parents and young people. This paper draws on data from an ESRC project entitled Autonomy, Rights and Children with Special Needs: A New Paradigm? (ES/P002641/1). Analysis of Scottish Government policy and legislation, key informant interviews and official statistics are used to examine the extent to which the new rights are likely to be realised in practice, given the complexity of the legislation and competition between discourses of needs, broadly synonymous with the wellbeing agenda and rights. The paper concludes with a discussion of the lessons which may be learnt from the Scottish experience, which will be of interest to an international audience.  相似文献   

College Students’ Reasons for Depression Nondisclosure in Primary Care     

William J. Meyer  Patrick Morrison  Anayansi Lombardero  Kelsey Swingle  Duncan G. Campbell 《Journal of College Student Psychotherapy》2016,30(3):197-205

Unwillingness to share depression experiences with primary care physicians contributes to the undertreatment of depression. This project examined college students’ reasons for depression nondisclosure to primary care providers (PCPs). Undergraduate participants read a vignette describing someone with depression and completed measures of disclosure barriers. Analyses indicated 26% of respondents would NOT disclose depression symptoms to PCPs. Reasons for nondisclosure included difficulty initiating the depression conversation, medication aversion, and fear of referral to a psychologist. Also, anger toward the vignette character varied with disclosure willingness, suggesting that nondisclosers feel more stigma than disclosers and are less likely to engage in psychotherapy. Because engagement in pharmacological and/or psychotherapeutic treatment requires identification of depression in healthcare settings, increased understanding of disclosure barriers could increase students’ access to depression treatment.  相似文献   

Dispute, dissent and the place of health promotion in a "disrupted tradition" of health improvement     

Duncan P 《Public understanding of science (Bristol, England)》2004,13(2):177-190

Dispute over the nature and purpose of health promotion has characterized the development of this field of activity in recent times. This paper explores such disputes and offers an explanation for them. I argue that health promotion and related fields (such as public health and health education) share in a "disrupted tradition." I assert that "health promotion" can be seen as the term presently favored by some to represent an extensive "tradition of protecting and improving the health of the public." Its relative favor and currency can be ascribed to a degree of power shift between competing groups operating with separate conceptions of health, away from biomedicine and towards more socially rooted understanding. Relative degrees of power and influence possessed by these groups at different historical times have contributed to the "disruption" of the tradition. Understanding this disruption helps explain a number of historiographical and theoretical problems besetting the field.  相似文献