Tier-specific evolution of match performance characteristics in the English Premier League: it’s getting tougher at the top     

Paul S. Bradley  David T. Archer  Bob Hogg  Gabor Schuth  Michael Bush  Chris Carling 《Journal of sports sciences》2016,34(10):980-987

This study investigated the evolution of physical and technical performances in the English Premier League (EPL), with special reference to league ranking. Match performance observations (n = 14,700) were collected using a multiple-camera computerised tracking system across seven consecutive EPL seasons (2006–07 to 2012–13). Final league rankings were classified into Tiers: (A) 1st–4th ranking (n = 2519), (B) 5th–8th ranking (n = 2965), (C) 9th–14th ranking (n = 4448) and (D) 15th–20th ranking (n = 4768). Teams in Tier B demonstrated moderate increases in high-intensity running distance while in ball possession from the 2006–07 to 2012–13 season (P < 0.001; effect size [ES]: 0.68), with Tiers A, C and D producing less pronounced increases across the same period (P < 0.005; ES: 0.26, 0.41 and 0.33, respectively). Large increases in sprint distance were observed from the 2006–07 to 2012–13 season for Tier B (P < 0.001; ES: 1.21), while only moderate increases were evident for Tiers A, C and D (P < 0.001; ES: 0.75, 0.97 and 0.84, respectively). Tier B demonstrated large increases in the number of passes performed and received in 2012–13 compared to 2006–07 (P < 0.001; ES: 1.32–1.53) with small-to-moderate increases in Tier A (P < 0.001; ES: 0.30–0.38), Tier C (P < 0.001; ES: 0.46–0.54) and Tier D (P < 0.001; ES: 0.69–0.87). The demarcation line between 4th (bottom of Tier A) and 5th ranking (top of Tier B) in the 2006–07 season was 8 points, but this decreased to just a single point in the 2012–13 season. The data demonstrate that physical and technical performances have evolved more in Tier B than any other Tier in the EPL and could indicate a narrowing of the performance gap between the top two Tiers.  相似文献   

A focus on time-lapse ethnography: learning to teach     

Alaster Scott Douglas 《Ethnography and Education》2019,14(2):192-205

This article makes the claim that developing ethnographic work through follow-up interviews can add to our understanding of researched phenomena and explores how using concepts from Bourdieu and theories on the social construction of time strengthen the research design and add a stronger longitudinal diachronic element to data analysis. Extending an ethnographic study of learning to teach by interviewing respondents nine years after the study and after the completion of their teacher education course is shown to develop insights around the initial research findings by focusing on the temporal aspects of data. Adopting this methodological approach can develop small-scale qualitative work and contribute to an accumulation of research findings to avoid simply revisiting familiar research ground.  相似文献   

Maternal history of child maltreatment and maternal depression risk in the perinatal period: A longitudinal study     

《Child abuse & neglect》2017

Existing research is limited, with only a few studies considering each single type and multiple types of child maltreatment (CM) as well as multiple assessments of maternal depression throughout the perinatal period. The purpose of the study was to assess each type and accumulative types of CM in relation to the risk of maternal depression throughout the perinatal period. In total, 276 pregnant women were recruited from the prenatal clinic at a general hospital in China. Maternal CM history and depression risk were assessed at late pregnancy, postpartum week 1, and postpartum week 4 using the Childhood Trauma Questionnaire (CTQ) and Edinburgh Postnatal Depression Scale (EPDS). The GEE showed that physical and emotional neglect and multiple types of CM were associated with higher overall depression risk across the perinatal period. The multinomial regression models showed physical neglect and multiple types of CM predicted higher risk of both antepartum and postpartum depression. Emotional and sexual abuse and emotional neglect predicted antepartum depression risk, while none of the three types of CM predicted postpartum depression risk. Physical abuse did not predict antepartum and postpartum depression risk. The findings suggest that maternal history of child physical and emotional neglect play significant roles in perinatal depression risk with physical neglect as the most important predictor. Routine screening for maternal CM history and depression risk in prenatal clinics is needed to aid in the early detection and treatment of depression.  相似文献   

Longitudinal trends in networks of university-industry-government relations in South Korea: The role of programmatic incentives   总被引：1，自引：0，他引：1  

Han Woo Park  Loet Leydesdorff 《Research Policy》2010,39(5):640-649

This study examines the longitudinal trend of systemness in networked research relations in South Korea using a triple helix (TH) indicator of university-industry-government (UIG) relations. The data were harvested from the Science Citation Index (SCI) and its counterparts in the social sciences (SSCI) and the arts and humanities (A&HCI). The total number of Korean SCI publications has grown rapidly since 1965. However, the TH indicator shows that the network dynamics have varied considerably according to the research policies of the national government. The collaboration patterns, as measured by co-authorship relations in the SCI noticeably increased, with some variation, from the mid-1970s to the mid-1990s. However, inter-institutional collaboration in the first decade of the 21st century was negatively influenced by the new national science and technology (S&T) research policies that evaluated domestic scientists and research groups based on their international publication numbers rather than on the level of cooperation among academic, private, and public domains. The results reveal that Korea has failed to boost its national research capacity by neglecting the network effects in science, technology, and industry.  相似文献   

Coping styles in youth exposed to maltreatment: Longitudinal patterns reported by youth in foster care     

《Child abuse & neglect》2017

Coping styles in youth living in foster care with a history of maltreatment were examined to determine the nature and stability of self-reported coping behavior over time. Participants included 542 (time 1), 377 (time 2), and 299 (time 3) youth ages 8–22 years (M = 13.28 years, SD = 3.04). Using the Behavioral Inventory of Strategic Control, a dimensional, continuous measure of coping, across four possible coping styles endorsed in reference to specific potentially stressful situations, the results indicated that direct action coping was the most frequently endorsed or preferred style for more than 50% of the sample at each time point. A number of youth endorsed using more than one coping style, indicating some flexibility in the approach to coping when problems occur. Although most youth endorsed a preferred style, coping style endorsed did vary somewhat over time. The coping style endorsed also varied depending on the type of problem referenced, but no statistically significant differences were noted across situations, including social, academic, general, and foster-specific situations. Effects for age were also examined and the results indicated no significant differences across the age range for type of coping most commonly endorsed. The present study is the first large-scale, longitudinal assessment of coping styles in youth in foster care and the results suggest that coping is not a simple, categorical-only construct and the implications for the endorsement of the direct approach for youth in foster care along with the other findings are discussed.  相似文献   

On the effects of motivation on reading performance growth in secondary school   总被引：1，自引：0，他引：1  

Jan Retelsdorf  Olaf KöllerJens Möller 《Learning and Instruction》2011,21(4):550-559

This research aimed at identifying unique effects of reading motivation on reading performance when controlling for cognitive skills, familial, and demographic background. We drew upon a longitudinal sample of N = 1508 secondary school students from 5th to 8th grade. Two types of intrinsic reading motivation (reading enjoyment, reading for interest), one type of extrinsic reading motivation (competition), and reading self-concept were measured by self-report questionnaires. Cognitive skills (reasoning, decoding speed) and reading performance were assessed using standardized tests and background variables were collected using student and parent questionnaires. Applying latent growth curve modeling, positive unique effects of reading enjoyment and reading self-concept and a negative unique effect of competition on the initial level of reading performance were recorded. Moreover, a positive unique effect of reading for interest on reading performance growth was recorded. One may conclude that enhancing students’ interest might be fruitful in terms of nurturing reading performance.  相似文献   

Stability and change in achievement goal orientations: A person-centered approach     

Heta Tuominen-Soini  Katariina Salmela-Aro 《Contemporary educational psychology》2011,36(2):82-100

Two longitudinal studies used a person-centered approach to examine the stability and change in students’ achievement goal orientations within a school year (i.e., during 9th grade; measurement period 4 months, N = 530) and between school years (i.e., across 11th and 12th grade; measurement period 12 months, N = 519). Distinct groups of students with different motivational profiles were extracted in both studies with considerable consistency in profiles across the two academic contexts (i.e., lower and upper secondary school). Four groups of students were identified in both studies: indifferent, success-oriented, mastery-oriented, and avoidance-oriented. Students’ motivational profiles were substantially stable; about 60% of all students displayed a stable motivational profile over time. Furthermore, most changes in the group memberships were directed towards similar groups. Findings support the conception of achievement goal orientation as an enduring disposition that reflects students’ generalized beliefs and tendencies to select certain goals and to favor certain outcomes.  相似文献   

The development of the classroom social climate during the first months of the school year     

M. Tim Mainhard  Mieke BrekelmansPerry den Brok  Theo Wubbels 《Contemporary educational psychology》2011,36(3):190-200

In this study the mean stability of classroom social climates during the first months of the school year and the deviation of individual classrooms (N = 48) and students (N = 1208) from this general trend were investigated by taping students’ interpersonal perceptions of their teachers. Multilevel growth modeling was used to identify the average development of the classroom social climate and between classroom and student differences in terms of this development. While significant differences between classrooms and students were found, these differences were rather stable over time. Most classrooms showed a slightly u-shaped trajectory. In only very few classrooms the quality of the social climate had increased at the end of the research period as compared to the very first lesson. Differences in the development between classrooms were associated to the emotional distance between teacher and students during the first lesson of the school year.  相似文献   

Opening up the black box: Teacher competence,instructional quality,and students’ learning progress     

《Learning and Instruction》2022

Existing research indicates inconsistent or at best weak predictive effects of teacher knowledge on student achievement. Data from Germany were used to examine the relation between teachers' content and pedagogical content knowledge, their perception, interpretation, and decision-making skills, the instructional quality implemented in class, and students' learning progression in mathematics. Rather than direct effects of teacher knowledge on students, we hypothesized an effect chain with multiple mediation processes while controlling for school type and student background. Multi-level modeling with 3496 students from 154 classrooms revealed a mediating role of teachers' skills and their instructional quality for the relation between teacher knowledge and students' learning progress. Effect sizes were medium to strong, and the model explained a large amount of variance. No direct effects of teachers’ knowledge on student progress were found. We discuss our findings with respect to the teacher-competence-as-a-continuum model and with respect to future research.  相似文献   

Variance Estimation Using Replication Methods in Structural Equation Modeling With Complex Sample Data     

Laura M. Stapleton 《Structural equation modeling》2013,20(2):183-210

This article discusses replication sampling variance estimation techniques that are often applied in analyses using data from complex sampling designs: jackknife repeated replication, balanced repeated replication, and bootstrapping. These techniques are used with traditional analyses such as regression, but are currently not used with structural equation modeling (SEM) analyses. This article provides an extension of these methods to SEM analyses, including a proposed adjustment to the likelihood ratio test, and presents the results from a simulation study suggesting replication estimates are robust. Finally, a demonstration of the application of these methods using data from the Early Childhood Longitudinal Study is included. Secondary analysts can undertake these more robust methods of sampling variance estimation if they have access to certain SEM software packages and data management packages such as SAS, as shown in the article.  相似文献