Children's Vulnerability to Interparental Conflict: The Protective Role of Sibling Relationship Quality     

Patrick T. Davies  Lucia Q. Parry  Sonnette M. Bascoe  Meredith J. Martin  E. Mark Cummings 《Child development》2019,90(6):2118-2134

This study tested whether the strength of the mediational pathway involving interparental conflict, adolescent emotional insecurity, and their psychological problems depended on the quality of their sibling relationships. Using a multimethod approach, 236 adolescents (M_age = 12.6 years) and their parents participated in three annual measurement occasions. Tests of moderated mediation revealed that indirect paths among interparental conflict, insecurity, and psychological problems were significant for teens with low, but not high, quality bonds with siblings. High-quality (i.e., strong) sibling relationships conferred protection by neutralizing interparental conflict as a precursor of increases in adolescent insecurity. Results did not vary as a function of the valence of sibling relationship properties, adolescent sex, or gender and age compositions of the dyad.  相似文献   

A Position Statement on Social Justice,Physical Education,and Bullying: A Figurational Sociological Perspective     

Mark Mierzwinski  Steven Cock  Philippa Velija 《Quest (Human Kinetics)》2019,71(2):215-226

ABSTRACT

Bullying is increasingly considered to be an important moral, political, and social issue within modern society. Academic research on this issue has mostly been examined through a psychological lens, often using questionnaire data to examine and explain the prevalence of different types of bullying. In this position statement, we apply a figurational sociological perspective to examine issues of school-based bullying in physical education. We critically reflect on attempts to position bullying amongst young people as a “social justice” issue and argue that core figurational principles might potentially help researchers strive toward a more reality-congruent means of conceptualizing the power-relationships that are inherent within bullying. We further maintain that the development of a more detached understanding of issues relating to bullying might provide a more adequate basis to contribute to future ongoing policy development.  相似文献   

Quantification of maximal power output in well-trained cyclists     

Thomas A. Wackwitz  Clare L. Minahan  Trish King  Chantelle Du Plessis  Mark H. Andrews  Phillip M. Bellinger 《Journal of sports sciences》2021,39(1):84-90

ABSTRACT

This study aimed to compare mechanical variables derived from torque-cadence and power-cadence profiles established from different cycle ergometer modes (isoinertial and isokinetic) and modelling procedures (second- and third-order polynomials), whilst employing a novel method to validate the theoretical maximal power output (P_max). Nineteen well-trained cyclists (n = 12 males) completed two experimental sessions comprising six, 6-s maximal isoinertial or isokinetic cycling sprints. Maximal pedal strokes were extracted to construct power–cadence relationships using second- and third-order polynomials. A 6-s sprint at the optimal cadence (F_opt) or optimal resistance (T_opt) was performed to assess construct validity of P_max. No differences were found in the mechanical parameters when derived from isokinetic (P_max = 1311 ± 415, F_opt = 118 ± 12) or isoinertial modes (P_max = 1320 ± 421, F_opt = 116 ± 19). However, R² improved (P < 0.02) when derived from isoinertial sprints. Third-order polynomial modelling improved goodness of fit values (Standard Error, adjusted R²), but derived similar mechanical parameters. Finally, peak power output during the optimised sprint did not significantly differ from the theoretical P_max in both cycling modes, thus providing construct validity. The most accurate P-C profile can be derived from isoinertial cycling sprints, modelled using third-order polynomial equations.  相似文献   

The impact of digital distraction on lecture note taking and student learning     

Flanigan  Abraham E.  Titsworth  Scott 《Instructional Science》2020,48(5):495-524

Instructional Science - Laptop computers allow students to type lecture notes instead of relying on the traditional longhand (i.e. paper–pencil) method. The present research compared laptop...  相似文献   

Service Blueprinting: A Method for Assessing Library Technologies within an Interconnected Service Ecosystem     

Scott W. H. Young  Sara Mannheimer  Doralyn Rossmann  David Swedman  Justin D. Shanks 《Public Library Quarterly》2020,39(3):190-211

ABSTRACT

Service blueprinting is a method for designing, assessing, and improving services. This article provides a practical overview of the service blueprinting process for library technology services. We begin by outlining the recent conversation around library technologies, service design, and service blueprinting. We then detail an iterative case study for the creation process of a service blueprint, followed by a discussion of the service insights and improvements that resulted from this activity. We conclude by offering a set of recommendations for creating and analyzing service blueprints. Ultimately, the service blueprint is a useful tool for understanding the operation of a service, and for situating that service within a broader and interconnected library ecosystem.  相似文献   

Influence of technique on upper body force and power production during medicine ball throws     

Mark GL Sayers  Silvio Lorenzetti 《Journal of sports sciences》2020,38(4):470-475

ABSTRACT

This project examined the interrelationships between power production and upper body kinematics during a series of medicine ball push-press (MBP-P) throws. Twenty-five regular weight trainers (body mass = 86 ± 10 kg) performed a series of ballistic vertical MBP-P throws at loads representing 5% and 10% of their assessed 5RM bench press. Throws were performed lying supine on a force platform (1 kHz) with upper body kinematics assessed using standard infra-red motion capture techniques (0.5 kHz). Gross measures of performance and power production such as peak vertical ball velocity (Vel_peak), peak force (F_peak) and power (P_peak) were recorded during the propulsive phase of the movement. Comparative analyses indicated that despite significant reductions in Vel_peak from the 5% to 10% loads (P < 0.001), F_peak remained largely unchanged (P = 0.167). Analysis of inter-trial variability showed that the gross measures of performance and power were relatively stable (Coefficient of Variation [CV%] <13%), while most upper limb segmental kinematics varied considerably between trials (CV% up to 70%). This project highlights the complexity of the relationships between power production and upper body kinematics during light load ballistic MBP-P throwing. Additionally, it shows how trained athletes can achieve similar outcomes during ballistic movements using a variety of movement strategies.  相似文献   

The Earlier the Better? Individual Participant Data and Traditional Meta-analysis of Age Effects of Parenting Interventions     

Frances Gardner  Patty Leijten  G.J. Melendez-Torres  Sabine Landau  Victoria Harris  Joanna Mann  Jennifer Beecham  Judy Hutchings  Stephen Scott 《Child development》2019,90(1):7-19

Strong arguments have been made for early intervention for child problems, stating that early is more effective than later, as the brain is more malleable, and costs are lower. However, there is scant evidence from trials to support this hypothesis, which we therefore tested in two well-powered, state-of-the-art meta-analyses with complementary strengths: (a) Individual participant data (IPD) meta-analysis of European trials of Incredible Years parenting intervention (k = 13, n = 1696; age = 2–11); (b) Larger, trial-level robust variance estimation meta-analysis of a wider range of parenting programs (k = 156, n = 13,378, M_age = 2–10) for reducing disruptive behavior. Both analyses found no evidence that intervention earlier in childhood was more effective; programs targeted at a narrower age range were no more effective than general ones.  相似文献   

Looking back: understanding visits to museums in the UK and beyond since the nineteenth century     

Mark O’Neill 《Cultural Trends》2019,28(1):1-5

  相似文献   

Martin Trow’s elite‐mass‐universal triptych: Conceptualising Higher Education development     

Peter Scott 《Higher Education Quarterly》2019,73(4):496-506

Martin Trow was among the most influential scholar in Higher Education studies in the second half of the 20th century. He is best known for his conceptualisation of the development of Higher Education into three stages—elite, mass and universal systems. This article considers, first, his intellectual method and the underpinning theory (or lack of it); secondly, the extent to which his ideas, generated in the exceptional environment of post‐war America were, and are, relevant to different national contexts and in the very different environment of the 21st century; thirdly, the strengths—and weaknesses—of Trow’s conceptualisation of three stages of Higher Education development; and, finally the new lines of research suggested by an overall assessment of his work.  相似文献   

The influence of semantic neighbours on visual word recognition     

Mark Yates 《Journal of Research in Reading》2012,35(2):215-226

Although it is assumed that semantics is a critical component of visual word recognition, there is still much that we do not understand. One recent way of studying semantic processing has been in terms of semantic neighbourhood (SN) density, and this research has shown that semantic neighbours facilitate lexical decisions. However, it is not clear if this facilitation reflects actual word recognition processes or is instead due to participant strategies used during the lexical decision task. To address this, the current research used college students as participants and tested the effect of SN density using the semantic categorisation and progressive demasking tasks. Both of these tasks require word identification and are not susceptible to the participant strategies that are seen when using the lexical decision task. The results show that SN facilitates responding in both tasks, indicating that SN effects are not due to task‐specific strategies.  相似文献