Reliability and validity of field-based measures of leg stiffness and reactive strength index in youths     

Rhodri S. Lloyd  Jon L. Oliver  Michael G. Hughes  Craig A. Williams 《Journal of sports sciences》2013,31(14):1565-1573

Abstract

The aim of the study was to assess the reliability of a mobile contact mat in measuring a range of stretch–shortening cycle parameters in young adolescents. Additionally, vertical leg stiffness using contact mat data was validated against a criterion method using force–time data. The reliability study involved 18 youths completing a habituation and three separate test sessions, while 20 youths completed a single test session for the validity study. Participants completed three trials of a squat jump, countermovement jump, and maximal hopping test and a single trial of repeated sub-maximal hopping at 2.0 Hz and 2.5 Hz. All tests were performed on the contact mat. Reliability statistics included repeated-measures analysis of variance, intraclass correlation coefficient, and coefficient of variation (CV), while the correlation coefficient (r) and typical error of estimate (TEE) were reported for the validity study. Squat jump height was the most reliable measure (CV = 8.64%), while leg stiffness during sub-maximal hopping, and reactive strength index produced moderate reliability (CV = 10.17–13.93% and 13.98% respectively). Measures of leg stiffness obtained from contact mat data during sub-maximal hopping were in agreement with the criterion measure (r = 0.92–0.95; TEE = 6.5–7.5%), but not during maximal hopping (r = 0.59; TEE = 41.9%). The contact mat was deemed a valid tool for measuring stretch–shortening cycle ability in sub-maximal but not maximal hopping. Although reliability of performance was generally moderate, the tests offer a replicable assessment method for use with paediatric populations.  相似文献   

Effects of playing surface on physiological responses and performance variables in a controlled football simulation     

Michael G. Hughes  Laurence Birdsey  Rob Meyers  Daniel Newcombe  Jon Lee Oliver  Paul M. Smith 《Journal of sports sciences》2013,31(8):878-886

Abstract

In spite of the increased acceptance of artificial turf in football, few studies have investigated if matches are altered by the type of surface used and no research has compared physiological responses to football activity on artificial and natural surfaces. In the present study, participants performed a football match simulation on high-quality artificial and natural surfaces. Neither mean heart rate (171 ± 9 beats · min^?1 vs. 171 ± 9 beats · min^?1; P > 0.05) nor blood lactate (4.8 ± 1.6 mM vs. 5.3 ± 1.8 mM; P > 0.05) differed between the artificial and natural surface, respectively. Measures of sprint, jumping and agility performance declined through the match simulation but surface type did not affect the decrease in performance. For example, the fatigue index of repeated sprints did not differ (P > 0.05) between the artificial, (6.9 ± 2.1%) and natural surface (7.4 ± 2.4%). The ability to turn after sprinting was affected by surface type but this difference was dependent on the type of turn. Although there were small differences in the ability to perform certain movements between artificial and natural surfaces, the results suggest that fatigue and physiological responses to football activity do not differ markedly between surface-type using the high-quality pitches of the present study.  相似文献   

Health-inclusive higher education: listening to students with disabilities or chronic illnesses     

Kate Hughes  Tim Corcoran  Roger Slee 《高等教育研究与发展》2016,35(3):488-501

This paper reports on a small-scale project undertaken with tertiary students who identified as having an impairment either at enrolment or by registering with the university's Disability Support Unit (DSU). The aim of the study was to explore with these students ways in which the university was currently meeting their academic support needs and the ways in which these needs might be better met. Consistent with the definition of disability within the Australian Disability Discrimination Act, it became apparent that a significant number of students who identified with that definition, or sought help from disability services, also presented with needs arising from chronic illness. The majority of participants cited an emotional or psychological illness, rather than a physical, intellectual or sensory one, as a possible precursor to difficulties in engagement with the university. We conclude by considering whether commonly used institutional categories are apposite to an understanding of the ways in which students perceive themselves and, importantly, their engagement with the university and success within it.  相似文献   

General education in research universities: Training programs for teaching assistants     

Julie A. Hughes 《Innovative Higher Education》1991,16(1):79-89

Suggestions for general education reforms have advocated smaller classes and greater participation by senior faculty. This is not feasible given the reward structure and extensive use of teaching assistants at research universities. Realistic reform efforts must account for the reward structure and focus on training programs for teaching assistants.She obtained her Ph.D. (1987) in Higher Education Administration, and her M.S. (1982) in Counseling and Human Development, both from the University of Iowa.  相似文献   

The effects of the Webster-Stratton parenting program on maltreating families: fostering strengths     

Hughes JR  Gottlieb LN 《Child abuse & neglect》2004,28(10):1081-1097

OBJECTIVE: This study examined the effects of the Webster-Stratton parenting program on the parenting skills of maltreating mothers and on the autonomy of their children (3-8 years). METHOD: A randomized controlled trial was used. Twenty-six maltreating families were randomly assigned to one of two conditions: the 16-hour weekly intervention group, or the 4-month wait list control group. Pre- and post-intervention independent assessments included a 2-hour home visit involving videotaped mother-child interactions during two prescribed, 10-minute play activities. RESULTS: Compared to the control group, treatment mothers demonstrated significant improvement in involvement and marginally significant improvement in autonomy-support, but no improvement in structure. Treatment group children showed no significant improvement in autonomy when compared to control group children. CONCLUSIONS: This parenting program proved effective with maltreating parents. The lack of demonstrated effect on children may reflect the need for a larger and more sustained treatment dose and/or the need to include parent-child interaction opportunities in the program. At the same time, while treatment gains were limited to the parent, the high treatment adherence rate (92% attended six or more of the eight program sessions) and low attrition rate (n=1) indicate that the treatment gains may hold potential for more thorough examination.  相似文献   

Using LOGO with Infant School Children     

Martin Hughes  Hamish Macleod  Cathie Potts 《教育心理学》1985,5(3-4):287-301

Abstract The recent introduction of micro‐computers into schools is opening up many new avenues for developmental psychologists interested in studying how children learn. Of particular interest at present are approaches in which children program computers themselves, using languages such as LOGO and PROLOG. This paper describes a study in which a simplified version of LOGO was introduced to a group of six‐year‐olds in a severely deprived area of Edinburgh. The children used a special touch‐sensitive keyboard (Concept Keyboard) to control the movements of a floor‐crawling robot called a Turtle. The sessions with the Turtle were marked by high levels of concentration, collaborative problem‐solving and the use of mathematical language. Pre‐ and post‐tests on the British Ability Scales revealed statistically significant gains on the sub‐scales concerned with number and shape: these gains, however, were found only in the boys.  相似文献   

Change in Student Perceptions of Course and Instructor Following Curriculum Change     

Vipin K. Agrawal  Poonam Khanna  Vijay K. Agrawal  Larry W. Hughes 《Decision Sciences Journal of Innovative Education》2020,18(3):481-516

Ongoing curriculum change in higher education is essential to enhance student learning and better prepare them for the job‐market. However, research shows that faculty are reluctant to implement such changes because students generally react adversely thereby negating any potential benefits, and moreover, sanction faculty through lower evaluations and future enrollment. Yet, understanding of the effect of curriculum changes on students’ course and instructor perceptions is limited. In this article we attempt to fill this gap. Drawing on two empirical findings—students’ motivation to attend college becoming increasingly extrinsic since the 1960s and their inability to recognize, ex ante, the value‐added by a curriculum change—and the norm life‐cycle theory, we argue that any effort‐increasing or grade‐threatening change is viewed as non‐normative and will lead to an adverse student reaction. However, this adverse reaction will dissipate over time once a critical mass of students is convinced of the merits of the new curriculum. We find support for our hypotheses by analyzing change in student perceptions following curriculum changes at a U.S. University. In addition, we also find that once the adverse reaction dissipates, students’ perceptions of the new curriculum become more positive than the old curriculum, only to be reversed once the revised curriculum is accepted as the new norm.  相似文献   

Measuring patrons' technology habits: an evidence-based approach to tailoring library services     

Jin Wu  Amy J. Chatfield  Annie M. Hughes  Lynn Kysh  Megan Curran Rosenbloom 《Journal of the Medical Library Association》2014,102(2):125-129

Librarians continually integrate new technologies into library services for health sciences students. Recently published data are lacking about student ownership of technological devices, awareness of new technologies, and interest in using devices and technologies to interact with the library. A survey was implemented at seven health sciences libraries to help answer these questions. Results show that librarian assumptions about awareness of technologies are not supported, and student interest in using new technologies to interact with the library varies widely. Collecting this evidence provides useful information for successfully integrating technologies into library services.  相似文献   

Using Young Adult Literature to Develop Content Knowledge of Autism for Preservice Teachers     

Elizabeth M. Hughes  Sarah Hunt-Barron  Jennifer Young Wagner  Lea Calvert Evering 《The Teacher Educator》2014,49(3):208-224

This promising practice explores the use of young adult literature as a supplement to texts in an undergraduate introduction to a special education course. Literature portraying adolescent characters with autism spectrum disorder (ASD) were used to build schema of preservice teachers. Participants' knowledge and attitudes about ASD were examined before and after reading a young adult novel of their choice. Results indicated that students in the literature group out-performed peers in the control group on measures of ASD content. Exemplars of students' responses suggested students who read the novel expressed increased knowledge and interest, recognition of commonalities, and complex and nuanced views of ASD. Participant satisfaction with reading the novels outside of class was also high, suggesting students found the authentic literacy experience enjoyable.  相似文献   

Student outcomes associated with use of asynchronous online discussion forums in gross anatomy teaching     

Rodney A. Green  Diane L. Hughes 《Anatomical sciences education》2013,6(2):101-106

Asynchronous online discussion forums are increasingly common in blended learning environments but the relationship to student learning outcomes has not been reported for anatomy teaching. Forums were monitored in two multicampus anatomy courses; an introductory first year course and a second year physiotherapy‐specific course. The forums are structured with a separate site for each course module and moderated weekly by staff. Students are encouraged to post to new threads (initial post) and answer queries in threads started by others (reply post). Analysis of forums was conducted separately for each course and included overall activity (posts and views) for a full semester and a detailed analysis for one week in the middle of semester. Students were classified as zero, moderate, or high contributors to the forums based on the number of posts. Final mark for the course was related to level of forum contribution using nonparametric tests. Forum threads were characterized as task‐focused, administrative, or other. A higher proportion of second year (36%) than first‐year (17%) students posted on the forums and the postings were more likely to be task‐focused and student initiated. Second‐year students that posted frequently to the forum gained a higher final mark for the course than those that did not post or only posted a moderate number of times (P < 0.01). This relationship was not evident for first‐year students who had a much higher proportion of administrative threads. Forums in anatomy courses can be powerful learning tools encouraging deeper learning and improved learning outcomes. Anat Sci Educ 6: 101–106. © 2012 American Association of Anatomists.  相似文献