Development and Validation of a Method for Determining Tridimensional Angular Displacements with Special Applications to Ice Hockey Motions     

Micheline Gagnon  Roland Doré  Roland Doré 《Research quarterly for exercise and sport》2013,84(2):136-143

Abstract

Tridimensional angular displacements of the skates were determined with a single cinecamera used in conjunction with two orthogonal rods attached to the rear part of the skater's boots. The method was based on the commutative law with the imposed restrictions that two of the angles were small in relation to the other one, and that a sequence of angular displacements was defined. This approach required the sole determinations of the planar coordinates of the three points delimiting the orthogonal rods. An experimental setup was designed to validate the method: the criterion angles were approximated with less than 2 degrees of error. Subsequently, the method was applied to a practical situation: the two-legged stop in ice hockey. The combination of this tridimensional method with instrumented strain gauge skates for the measurement of forces provides a new and powerful tool for performing kinetic analyses in tridimensional skating activities.  相似文献   

Social changes in youth sports participation styles 1969–1999: the case of Flanders (Belgium)     

Jeroen Scheerder  Marijke Taks  Bart Vanreusel  Roland Renson 《Sport, Education and Society》2013,18(3):321-341

Three issues are put forward with respect to the active participation of young people in leisure-time sports styles. It is considered (a) whether sports participation styles can be detected over the last three decades, (b) whether they have changed in this period of time, and (c) whether traditional parameters understood as structuring and positioning young people's lifestyles are still relevant with respect to their sports participation preferences. Youth sports participation data were retrieved from four large-scale surveys in 1969, 1979, 1989 and 1999 (N_total=22,424 high school boys and girls). These data allow for a time trend analysis of youth sports participation styles. Results from component and regression analyses indicate that different participation styles can be distinguished for each period of time and that these styles have been developing and differentiating through a growing responsiveness to wider social trends. Structural and positioning variables such as age, sex and education remain significant determinants for young people's active participation in leisure-time sports styles over the observed period of time. Although these social structures continue to shape youth sports participation styles, it is suggested that there is more variety within social groups than among social groups partially due to processes of individualisation and homogenisation.  相似文献   

Measurement of cognitive load in multimedia learning: a comparison of different objective measures     

Andreas Korbach  Roland Brünken  Babette Park 《Instructional Science》2017,45(4):515-536

Different indicators are interesting for analyzing human learning processes. Recent studies analyze learning performance in combination with cognitive load, as an indicator for learners’ invested mental effort. In order to compare different measures of cognitive load research, the present study uses three different objective methods and one subjective method, reviewing the seductive details effect in a computer-based multimedia learning instruction. An experimental two-group design (N = 50) was used, with exposure to seductive details during learning as the between group factor. Eye movements were analyzed concerning the indicated cognitive activity and cognitive load was measured by the rhythm method (Park 2010; Park and Brünken 2015), the index of cognitive activity (ICA) (Marshall 2007), as well as by subjective ratings of mental effort and task difficulty (Paas 1992). Results confirm the seductive details effect for learning success with a decrease in retention and comprehension performance, an increase in total cognitive activity indicated by eye movements and significant higher cognitive load, indicated by rhythm method. The ICA values and the subjective ratings on mental effort and task difficulty show no difference in cognitive load between the groups. The results provide evidence of the suitability of different objective measures for a direct and continuous cognitive load assessment in multimedia learning. Further, the results show the benefit of combining different methods to gain detailed insight into information processing while learning with multimedia as well as a differentiated access to the single cognitive load factors.  相似文献   

An Historical Perspective on Instruments and Experiments in Science Education     

Peter Heering  Roland Wittje 《Science & Education》2012,21(2):151-155

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How emotionally intelligent are pre-service teachers?     

Roisin P. Corcoran  Roland Tormey 《Teaching and Teacher Education》2012

Although there is evidence that teacher emotional intelligence is important for pupil adjustment and learning and for teachers in managing the emotional demands of their work, little is known about the levels of emotional skill of teachers and beginning teachers. Using Mayer and Salovey's emotional intelligence (EI) model and the MSCEIT test of EI, this study investigates how emotionally skilled student teachers are (N = 352). Results show lower than average levels of EI among student teachers, but with important differences between students and across emotional skill areas. The implications of the findings for pre-service teacher education are explored.  相似文献   

A bold and promising model with a few loose ends     

Roland S. Persson 《High Ability Studies》2012,23(1):97-99

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The Clinical Relevance of Information Index (CRII): assessing the relevance of health information to the clinical practice     

Maria Cristiane Barbosa Galvao  Ivan Luiz Marques Ricarte  Roland M. Grad  Pierre Pluye 《Health information and libraries journal》2013,30(2):110-120

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Whose university is it anyway? Power and privilege on gendered terrain     

Roland W. Mitchell 《International journal of qualitative studies in education》2013,26(3):357-360

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Bullying,depressive symptoms and suicidal thoughts     

Erling Roland 《Educational research; a review for teachers and all concerned with progress in education》2013,55(1):55-67

Bullies, victims and pupils neutral to bullyingwere compared on depressive symptoms and suicidal thoughts.The sample included 2,088 Norwegian boys and girls in grade 8. The results revealed that both bullies and victims had significantly higher mean scores than neutral pupils on both depressive symptoms and suicidal thoughts. Victims had a significantly higher mean score on depressive thoughts than the bullies. On suicidal thoughts, the mean score for bullies was above that of the victims, but this differencewas not significant. Girls had significantly higher mean scores than boys on both depressive symptoms and suicidal thoughts. This was the case for all pupils, and for victims, bullies and the neutral pupils. Questions of causality between depressive symptoms, suicidal thoughts and involvement in bullying are discussed and research on this issue is suggested.  相似文献   

Implementation of an innovation: Meeting the concerns of teachers   总被引：1，自引：0，他引：1  

Rudolf van den Berg  Peter Sleegers  Femke Geijsel  Roland Vandenberghe 《Studies in Educational Evaluation》2000,26(4):1

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