Biomechanical differences in soccer kicking with the preferred and the non-preferred leg

The aims of this study were to examine the release speed of the ball in maximal instep kicking with the preferred and the non-preferred leg and to relate ball speed to biomechanical differences observed during the kicking action. Seven skilled soccer players performed maximal speed place kicks with the preferred and the nonpreferred leg; their movements were filmed at 400 Hz. The inter-segmental kinematics and kinetics were derived. A coefficient of restitution between the foot and the ball was calculated and rate of force development in the hip flexors and the knee extensors was measured using a Kin-Com dynamometer. Higher ball speeds were achieved with the preferred leg as a result of the higher foot speed and coefficient of restitution at the time of impact compared with the non-preferred leg. These higher foot speeds were caused by a greater amount of work on the shank originating from the angular velocity of the thigh. No differences were found in muscle moments or rate of force development. We conclude that the difference in maximal ball speed between the preferred and the non-preferred leg is caused by a better inter-segmental motion pattern and a transfer of velocity from the foot to the ball when kicking with the preferred leg.     

‘My language tree’: young Finland‐Swedish adults tell us about their linguistic and cultural identities

The education of teachers in Swedish Finland is a stage for a powerful display of Finland‐Swedish culture. This paper discusses the voices on this cultural stage, exploring the patterns in the stories these young Finland‐Swedish adults tell about their linguistic and cultural identities.     

Introduction

Abstract

The popularity of twins and non‐twins at school was studied longitudinally. Eight categories of pupils were distinguished by classifying them according to sex and twin type: monozygotic, dizygotic same‐sex, and dizygotic opposite‐sex as well as male and female non‐twins. Popularity ratings done by classmates on two different occasions at 11 and 13 years of age were analyzed. Differences in popularity between categories as well as changes in popularity over time were considered. The main results obtained seem to confirm and extend earlier findings reported in the literature about popularity differences between twins and non‐twins. For popularity change a relative similarity between categories was found significant, which implies that all categorical differences in popularity change can be better explained by the categorical differences in popularity at age 13 than by those at age 11.     

Investigating Students' Perceived Discipline Relevance Subsequent to Playing Educational Computer Games: A Personal Interest and Self-Determination Theory Approach

The purpose of this study is to explain students' perceived relevance of playing an educational game as a means for development of discipline competence. Based on self-determination theory and the concept of personal interest, we propose that: Satisfying students' basic needs for competence, autonomy, and relatedness when playing educational games is critical for arousal of intrinsic motivation in learning-through-gaming; Students' interest in the core subject and their intrinsic motivation in learning-through-gaming are important for their perceptions of how relevant they believe the gaming session is for the discipline they are studying. The results from an empirical study indicate that arousal of intrinsic motivation in the ongoing gaming session is more important than pre-gaming interest in the core subject for participants' post-gaming perception of how relevant such gaming is as a means for developing their discipline competence. The results also indicate that satisfying basic needs for competence, autonomy, and relatedness is critical for arousal of intrinsic gaming motivation. Our findings have implications for the choice of pedagogical means when utilizing educational games as a complementary alternative to traditional learning methods. To that end, we offer directions for future research.     

Movement pattern and physiological response in recreational small-sided football – effect of number of players with a fixed pitch size

Recreational soccer is an effective health-promoting activity, but it is unclear how different game formats influence internal and external load. Thus, to be able to advise how to maximise the outcome of recreational football, we examined movement pattern and physiological response in 11 untrained men (32.6 ± 6.7 yrs, 23.3 ± 4.9 fat%, 43.4 ± 5.3 ml·min^?1·kg^?1) during three football sessions comprising 4 × 12 min of 3v3, 5v5 or 7v7 with a constant pitch size of 20 × 40 m. Movement pattern, heart rate (HR), blood lactate and RPE were measured during and after the 12-min periods. Greater (P < 0.05) total distance and high-speed distance was covered during 3v3 than 5v5 (14 and 30%) and 7v7 (15 and 75%). Mean HR was higher in 3v3 (85.7 ± 5.7%HRmax) and 5v5 (84.2 ± 5.1%HRmax) than in 7v7 (80.7 ± 4.6%HRmax, P < 0.05) and percentage time >90%HR was higher in 3v3 (43 ± 18%, P < 0.05) than in 5v5 (28 ± 21%) and 7v7 (18 ± 14%). Blood lactate was higher in 3v3 (7.4 ± 2.7 mmol·l^?1) than in 7v7 (4.5 ± 2.2 mmol·l^?1, P < 0.001) but not in 5v5 (6.1 ± 2.1 mmol·l^?1, P = 0.061). RPE was higher in 3v3 (6.7 ± 2.3, P < 0.01) than in 5v5 (5.2 ± 2.2) and 7v7 (4.3 ± 2.3). In conclusion, higher external and internal load was found with fewer players, when the pitch size is fixed.     

Motivation for reading comprehension

In a sample of 104 Norwegian ninth-grade students, we examined whether perceived reading efficacy and reading task value uniquely predicted the comprehension of a social studies text after variance associated with gender, achievement in the domain, topic knowledge, deeper strategies, and surface strategies had been removed through forced-order hierarchical multiple regression analysis. Results showed that even after removing variance from these variables, the motivation constructs accounted for additional variance. However, only reading task value was a statistically significant positive predictor of reading comprehension, whereas the relationship between reading efficacy and reading comprehension did not reach statistical significance. Thus, reading task value seems particularly important because it can override the contributions of other important constructs. In terms of education, the findings suggest that an emphasis on cognitive constructs such as prior knowledge and strategic text-processing should not make us overlook the specific importance of promoting motivation for reading comprehension.     

‘So,how does one define a friendship?’: Identifying friendship among students using AAC in inclusive education settings*

The characteristics of friendships among children who use augmentative and alternative communication (AAC) are not well understood. Research on friendships among children without disabilities has identified similarity to each other as a key characteristic among friends. The aim of this study was to identify and describe the friendships between students using AAC and fellow students in Norwegian mainstream public schools. Participants were students using AAC in first to fourth class, fellow students, parents, and staff. Data were analysed using a constructive grounded theory approach. The participants provided diverse reports about the friendships, although all students using AAC reported having friendships at school. The friendships were described by parents and staff as superficial and students using AAC were seldom perceived as playmates by fellow students. The results indicated that friendships between students using AAC and fellow students were often unilateral. The results are discussed along with the implications for future research.     

Prisoners’ academic motivation,viewed from the perspective of self-determination theory: Evidence from a population of Norwegian prisoners

International Review of Education - The study presented in this article explores prisoners’ academic motivation structure from the theoretical perspective of self-determination theory, using...