Promotion of autonomy for participation in physical activity: a study based on the trans-contextual model of motivation

The aim of this study was to analyse the effects of a school-based intervention to promote physical activity, utilising the postulates of the trans-contextual model of motivation. The study examined two separate classes of elementary school students (mean age 11.28?years), one of which served as the control group (n?=?26) and the other as the experimental group (n?=?21). The intervention in the experimental group consisted of showing videos related to physical activity participation, conducting discussions and doing tasks related to the content presented in the videos and conducting family discussions. Autonomy support from teachers, peers and parents; motivation in physical education and leisure time physical activity; the different variables of theory of planned behaviour; and physical activity, were measured before and after the intervention. Results showed an increase in teacher autonomy support, identified regulation in physical education, autonomy support from parents and peers, integrated and identified regulation in leisure time physical activity, control, subjective norm, intention and physical activity in the experimental group. Furthermore, this increase resulted in post-intervention differences across groups in such variables. Results are discussed in relation to the important role of families in the promotion of physical activity participation.     

Children's shyness,popularity, school liking,cooperative participation,and internalizing problems in the early school years

Aims of the present study included understanding the manner in which shyness during the first year of formal schooling predicts early popularity in the peer group, as well as the manner in which children's shyness and popularity uniquely contribute to later school liking, cooperative participation, and internalizing problems. Structural equation modeling using parents’, teachers’, and children's reports suggested that children's (N = 291; 46% girls) kindergarten shyness predicted lower school liking and lower cooperative participation during second grade through its negative association with first grade popularity. Shyness during the first year of formal schooling may relate to difficulties in the classroom during later years due to problematic peer relations. The indirect relation of kindergarten shyness to second-grade internalizing problems through first-grade popularity was not statistically significant. Kindergarten shyness was also directly related to higher cooperative participation, which suggests that relations between early shyness and classroom engagement may be more complex than previously assumed.     

Operational space consensus of multiple heterogeneous robots without velocity measurements

This paper proposes a control algorithm for networks of multiple heterogeneous robot manipulators, which solves the leader–follower and the leaderless consensus problems in the operational space. In the leader–follower scenario, the controller ensures that all the robots in the network asymptotically reach a given leader pose (position and orientation), provided that, at least, one follower robot has access to the leader pose. Without a leader pose, in the leaderless problem, the robots asymptotically reach a pose of consensus. The controller is a simple distributed proportional plus damping injection (P+d) scheme which does not require velocity measurements. A singularity-free representation, unit quaternions, is used to describe the orientation of each manipulator. The paper presents some simulations, with a network of six 6-Degrees-of-Freedom (DoF) manipulators, and experiments, with a network of three 6-DoF manipulators, to show the effectiveness of the proposed controller.     

The Undereducation and Overcriminalization of U.S. Latinas/os: A Post-Los Angeles Riots LatCrit Analysis

This article presents an overview and discussion of qualitative research in education by analyzing the roles of researchers, the history of the field, its use in policymaking, and its future influence on educational reform. The article begins by describing the unique position that qualitative educational researchers have in higher education, as they often attempt to serve both academic and policymaking audiences. The article then moves to discuss the ascent of qualitative methods in the social sciences and educational research. The article concludes by attempting to work through a number of pressing concerns that qualitative researchers may face in upcoming decades; specifically, the final section presents possible strategies to improve the relevance and impact of qualitative researchers’ work on reframing educational policy at local, state, and federal levels to meet the demands of equality and social justice.     

Examination of Factors that Predict Academic Adjustment and Success of Community College Transfer Students in STEM at 4-Year Institutions

ABSTRACT

There are a limited number of individuals who possess the skills to fulfill the workforce demand in STEM (science, technology, engineering, and math) in the United States. Therefore, community colleges and 4-year institutions must be able to identify academic and social factors that impact students’ participation in the areas of STEM. These institutions must also explore the possibility that these factors contribute to the high rate of students switching out of STEM fields. This study’s purpose was to develop a better understanding of the perceptions of community college transfer students who continue at a 4-year institution to determine academic and social factors that influenced their academic success in STEM. To collect the quantitative data, the Laanan-Transfer Students’ Questionnaire was utilized. The results of this study reveal that Academic Adjustment was predicted by father’s highest level of education, interaction with faculty at the community college and university, and perception as a transfer student at the university. The cumulative grade point average (GPA), was predicted by the highest level of education of the father, associate degree obtained at the community college, community college transfer GPA, general courses from the community college, transfer credit hours, and university course learning. Overall, the findings indicate that community colleges and 4-year institutions should encourage students to be connecting more in class and after class—not only with their peers, but also with faculty. Findings also suggest that students should become more involved academically and socially to enhance their academic and social adjustment at a 4-year institution.     

Understanding Deaf bilingual education from the inside: a SWOT analysis

This article reports on a Strengths, Weaknesses, Opportunities and Threats (SWOT) analysis using a nominal group process undertaken to identify and tackle significant factors, both internal and external, affecting those current Deaf bilingual practices in Spain which promote or prevent the processes through which more inclusive (barrier-free) education for Deaf children can be successfully implemented. Seventeen school representatives (eight Deaf, nine hearing) from nine school sites with leading Deaf bilingual initiatives for Deaf children from different parts of the country participated in the study. Ways to improve accessibility to the whole SWOT process were explored to ensure that genuine and significant participation of All school representatives was actually possible. The main strengths pointed out the importance of participation and involvement of staff and others in the educational community. The primary weakness was found in the lack of a learning environment fully accessible to Deaf children. Notable opportunities included a growing acceptance of the bilingual and inclusive school concept by regional educational administrations and societal and parental changes towards bilingualism and sign language. The lack of official recognition of sign language was reported as a major threat. Understanding these four internal and external interrelated factors can: (1) help insiders reflect on their practices and use the findings to improve their practice; (2) guide policy decisions on matching resources and capabilities to the environment in which schools catering for Deaf children operate; and (3) provide the starting point upon which policy-making and further research could be built.     

Dimensions as Virtual Items: Improving the predictive ability of top-N recommender systems

Traditionally, recommender systems for the web deal with applications that have two dimensions, users and items. Based on access data that relate these dimensions, a recommendation model can be built and used to identify a set of N items that will be of interest to a certain user. In this paper we propose a multidimensional approach, called DaVI (Dimensions as Virtual Items), that consists in inserting contextual and background information as new user–item pairs. The main advantage of this approach is that it can be applied in combination with several existing two-dimensional recommendation algorithms. To evaluate its effectiveness, we used the DaVI approach with two different top-N recommender algorithms, Item-based Collaborative Filtering and Association Rules based, and ran an extensive set of experiments in three different real world data sets. In addition, we have also compared our approach to the previously introduced combined reduction and weight post-filtering approaches. The empirical results strongly indicate that our approach enables the application of existing two-dimensional recommendation algorithms in multidimensional data, exploiting the useful information of these data to improve the predictive ability of top-N recommender systems.     

Sports injuries in an America's Cup yachting crew: A 4-year epidemiological study covering the 2007 challenge

Abstract

The aim of this study was to describe the injuries sustained by an America's Cup crew during eight preparatory competitions of the 32nd America's Cup 2007 and the Louis Vuitton Cup (from October 2004 to June 2007). The anatomical location, type of injury, and mechanism of injury were recorded. The injuries were categorized based on each sailor's position on the boat according to three intensities of physical demands. The injury rates per sailor and per 1000 h of competition were determined. In total, 90 injuries were registered. The overall incidence was 10 injuries per 1000 competition hours. Overuse injuries accounted for 76.6% of all lesions. The most common anatomical location of injuries was the upper limb (36.6%), followed by the upper dorsal and cervical spine (34.4%). Frequency of injury was related to the sailor's position on the boat, being higher in the group with more demanding activities (grinder, bowman, and mastman). Most injuries (67%) were sustained by this group of sailors. The most common injuries in this group were muscle contractures of the quadratus lumborum (11), trapezius (8), and rhomboid (7). There were eight cases of elbow epicondylitis, four cases of tendinopathy of the supraspinous tendon, and three cases of tendinopathy of the biceps brachii. An America's Cup yachting crew is exposed to a high risk of overuse injuries, especially those sailors whose boat position involves high-intensity activity.     

The validity and reliability of a novel app for the measurement of change of direction performance

ABSTRACT

The aim of the present investigation was to analyze the validity and reliability of a novel iPhone app (CODTimer) for the measurement of total time and interlimb asymmetry in the 5 + 5 change of direction test (COD). To do so, twenty physically active adolescent athletes (age = 13.85 ± 1.34 years) performed six repetitions in the COD test while being measured with a pair of timing gates and CODTimer. A total of 120 COD times measured both with the timing gates and the app were then compared for validity and reliability purposes. There was an almost perfect correlation between the timing gates and the CODTimer app for the measurement of total time (r = 0.964; 95% Confidence interval (CI) = 0.95–1.00; Standard error of the estimate = 0.03 s.; p < 0.001). Moreover, non-significant, trivial differences were observed between devices for the measurement of total time and interlimb asymmetry (Effect size < 0.2, p > 0.05). Similar levels of reliability were observed between the timing gates and the app for the measurement of the 6 different trials of each participant (Timing gates: Intraclass correlation coefficient (ICC) = 0.651–0.747, Coefficient of variation (CV) = 2.6–3.5%; CODTimer: ICC = 0.671–0.840, CV = 2.2–3.2%). The results of the present study show that change of direction performance can be measured in a valid, reliable way using a novel iPhone app.